Development of a proprietary SaaS system for automating coffee shops - similar to Poster POS

Budget: 270000 UAH Deadline: 30 days

Hello, I see this is not just a website, but a multi-user SaaS with a checkout, inventory, roles, and data isolation between establishments. I work with PHP, MySQL, JavaScript, Laravel, and have created modules for CRM, online stores, and accounting systems. For the MVP, I will propose a structured architecture, admin panel, POS logic, reports, and documentation. I am ready to work in stages, separately assess UI/UX, and provide a development plan after clarifying the details.

Budget: 27000 UAH Deadline: 10 days

Hello!
We are the Business Atlas team, official partners of n8n. Creating your own SaaS competitor for Poster POS is a large-scale and ambitious challenge. Building a multi-tenant system with complete data isolation, real-time cash changes, and inventory accounting is a task that requires impeccable technical architecture.
We are ready to implement this project turnkey. Since we focus on a smart combination of classic coding and automation, we offer a hybrid approach that will save you up to 40% of your backend development budget and allow you to launch the MVP significantly faster.
Our architectural solution for your SaaS:
Client side (Frontend): A responsive web application (for tablets and PCs) on React / Next.js. It will ensure high cashier interface speed even with weak internet.
Database and security: PostgreSQL / Supabase with Row-Level Security (RLS) configuration. This guarantees 100% concrete data isolation for each establishment at the database level.
Automation and integration core (n8n/Make): Instead of writing thousands of lines of code for receipt fiscalization (Checkbox), payment terminals, transactional messages, and reports, we move these processes to n8n. This will allow for instant connection of new services and adaptation of rates for clients without rewriting system code.
Why us?
Relevant experience: We developed the Reem Online system (CRM/ERP for auto services with spare parts accounting and customer base) and worked with a high-load mobile service, so we know how to design stable databases.
Expertise in accounting: We have ready-made solutions for synchronizing balances, cash reports, and automatic generation of fiscal receipts.
MVP estimation (Registration, cash interface, basic inventory, reports, rates):
Development cost of MVP: $9,500 – $15,000 (payment in stages for each completed sprint/module).
Implementation time: 8–10 weeks.
Message me in private messages — we will discuss the details. Expand

Budget: 27000 UAH Deadline: 5 days

Margarita, I see here not just an MVP, but the foundation of a multi-user SaaS with data isolation, roles, checkout, inventory, and pricing. I develop web services on Laravel, work well with HTML/CSS/JS, and build structured code with scalability in mind. I can offer a phased implementation: UX prototype, MVP core, reporting, and admin panel. I am ready to discuss the stack, team, timelines, and support, and work through the phases.

Budget: 27000 UAH Deadline: 14 days

Hello.

I am a NodeJS developer. I am ready to take it on. Write to me, we will discuss.

Budget: 27000 UAH Deadline: 18 days

Margarita, I see the task as a SaaS with clear data isolation, roles, checkout, inventory, and reports — this is precisely what should be properly established at the MVP stage. I work with Laravel, Vue, and MODX, have a background in web systems, and can offer a structured architecture, admin panel, responsive interface, and technical documentation. I am ready to work in stages: separately on UX/UI, MVP, testing, and further development. Let's discuss priorities and the format of collaboration.

Budget: 27000 UAH Deadline: 14 days

😀 Hello!
✅ I will take on the development 👌
✅ I have done similar work — web systems/SaaS (backend + frontend + database, roles, payments) 🎯
🛠 How I will do it: a custom web service for cafes — menu/inventory, orders and tables, cash register/receipts, payments, employees with roles, reports and analytics; multi-accounting (SaaS) + admin panel. Stack Node/TS + React, custom architecture (without copying Poster). Start with MVP → iterations
🎥 Portfolio: Freelancehunt
✅ Contact me, and we will agree on the scope of MVP and priorities 👌🙂

Budget: 27000 UAH Deadline: 10 days

Good day, the task is clear: you need not just an interface, but a scalable multi-tenant SaaS with data isolation, roles, checkout, inventory, and reporting. I have been creating turnkey web systems for 8 years, and I work well with responsive admin panels, authorization, catalogs, accounting, and business process logic. I propose an MVP in stages: UX/UI, architecture, core development, testing, and documentation. I can assess the stack, team, timelines, and support after launch. I am ready to discuss the first stage.

Budget: 27000 UAH Deadline: 10 days

Hello.

We can take on the development of an MVP SaaS service for coffee shops and small establishments. From the task, it is clear that this should not just be a cash register, but a multi-user system with data isolation, roles, pricing, inventory, sales, and reporting.

For the MVP, I see the stack: React / Next.js for the interface, Node.js or Laravel for the backend, PostgreSQL, Redis for speed and queues, a separate admin panel for the service owner. The architecture can be laid out for SaaS from the start: multiple establishments, roles, pricing limitations, secure data handling, and scalability.

In the first phase, we can implement: registration, establishments, employees, products, modifiers, cash interface, changes, sales, returns, basic inventory, customers, loyalty, reports, pricing, and admin panel.

We work in stages: first UI/UX and MVP structure, then backend, cash interface, inventory, reports, testing, and launch. After that, we can gradually add a mobile application, receipt printing, payment terminals, fiscalization, delivery, API, and integrations.

Estimated time for MVP: 3–5 months, depending on the depth of functionality.
The cost is better calculated after a brief clarification of the MVP, but we can work in stages with payment for each completed block.

We are ready to discuss the details, propose architecture, development stages, and separately evaluate UI/UX design and further support. Expand

Budget: 100000 UAH Deadline: 60 days

I can take on the turnkey execution of this project. The application will be developed on React and the backend will be either Express or Next.js (here both frontend and backend). As a bonus, I can adapt the website for a mobile application, and you will have the app in the App Store and Google Play.

Budget: 30000 UAH Deadline: 11 days

We will develop a reliable, scalable Multi-tenant SaaS platform for automating coffee shops with strict data isolation (Row Level Security in PostgreSQL or separate schema architecture), an adaptive cash register interface on React/TypeScript, and a stable API on Node.js. We will provide an offline mode for the cash register so that sales do not stop during internet outages at the establishment.

Hello, Margarita! I am Nina, the manager of the IT agency Valflow. The design of complex multi-user systems architecture (SaaS, ERP, CRM) and backend development is handled by Valentin — a Senior Developer with experience in building secure databases, isolating client data, and automating business processes.

Our approach to creating an analog of Poster POS (MVP):
— Data Isolation & Scalability: We will apply a Multi-tenancy approach at the PostgreSQL database level. The data of each coffee shop is completely isolated at the architecture level, eliminating any possibility of leakage or cross-information between clients.
— Cash Register Interface (Front-end): A fast, adaptive SPA application on React + Tailwind CSS. We will optimize the interface for tablets and smartphones. We will implement a mechanism for saving transactions in LocalStorage with subsequent asynchronous synchronization with the server in case of unstable connectivity at the establishment.
— Inventory and Financial Accounting (Back-end): Clean code on Node.js (NestJS) for tracking stock levels, writing off ingredients according to technical cards when selling products, maintaining a history of changes, and generating analytical reports on revenue/shifts.
— Admin Panel and Billing: A super-admin panel for managing subscriptions, pricing plans, limits on the number of launches of establishments/employees, and monitoring system activity.

Proposal for cost and stages (Design + MVP):
Creating a full-fledged commercial SaaS product of this level is a complex task that cannot be implemented qualitatively within the budget specified in the title. We propose to divide the project into transparent stages.

Stage 1: Database architecture design, interactive UI/UX design of all screens (cash register, admin panel, inventory) in Figma, and development of technical documentation.
— Cost: 30,000 UAH
— Timeline: 10–12 days

A complete estimate for the software development of the MVP (all 17 points of your specifications) will be provided based on the approved design and architecture (estimated budget for the development of the MVP codebase: €4,000–€5,500, divided into 4–5 sub-stages through Business-Safe). The rights to the source code will fully transfer to you.

Write to us in private messages - we will discuss the details, show examples of our accounting and architectural solutions, and Expand

Budget: 40000 UAH Deadline: 7 days

Hello! I have experience in creating similar systems, including web CRM with statistics, online payments, etc. I can handle both front-end and back-end myself. Stack: Node.js, Vue, PostgreSQL. I can assemble a test example in a week, and I think the entire project with tests can be launched in 3-4 weeks. The estimated total cost is $1000-1500, including support for 2 weeks after the project launch. I would be happy to discuss the details!

Budget: 27000 UAH Deadline: 21 days

Hello. For this rate, I will complete the first working stage of the SaaS: multi-tenancy, authorization, roles, product catalog, basic checkout scenario, and PostgreSQL schema, on which the product can be continued.

I have my own multi-tenant projects with Next.js, FastAPI/Node.js, Postgres, roles, pricing, admin panels, and Docker. A full analog of Poster will not fit within the specified budget, so I propose an honest first MVP without simulating the entire product.

Which single scenario is critical for the first launch: sales, inventory, or changing the cashier?

Budget: 222222 UAH Deadline: 1 day

Hello, Margarita! The stated budget of 27,000 UAH is the cost of detailed design (Discovery) or quality UI/UX design, but definitely not the development of a ready-made SaaS product at the level of Poster. Attempting to write such a system for this amount will lead to critical bugs and the leakage of clients' financial data. Here is a real Roadmap and the market cost of a turnkey MVP (total duration: 3-4 months / budget: $9,000–$13,000):

Stage 1: Design, Design, and Data Architecture ($1,500–$2,000 / 2-3 weeks). Development of the UI/UX checkout in Figma + data isolation architecture (PostgreSQL RLS). This perfectly fits your current budget as the first step.

Stage 2: Core and POS Checkout Interface ($3,500–$5,000 / 4-5 weeks). Roles, checks, offline operation (Offline-first through IndexedDB) in case of internet loss.

Stage 3: Inventory Accounting and Loyalty ($2,500–$3,500 / 3-4 weeks). Technical cards, stock accounting, ingredient calculation, bonus system.

Stage 4: Billing and Admin Panel ($1,500–$2,500 / 2 weeks). Super admin panel of the service + automatic subscription deductions from cafes via Stripe/WayForPay.

Recommended stack: Node.js (NestJS) + React/Next.js + PostgreSQL + Docker.

I suggest not trying to do everything poorly. We can make a safe agreement for Stage 1 (Discovery): we will fully design the technical specifications, process logic, and clickable design of the checkout. With this foundation, you will be able to finance the development step by step. If you are close to such a sober business approach — let’s discuss the details in private messages. Expand

Budget: 27000 UAH Deadline: 28 days

Hello!

My team and I are ready to implement the project "turnkey" - from design to full development and launch. Our team includes experienced developers, designers, and UX/UI specialists, so we can create a convenient, modern, and functional product according to your requirements.

We will be able to determine the timelines and budget accurately after discussing the details and understanding the full scope of work. I would appreciate your feedback, and I can send examples of our work in private messages.

Budget: 27000 UAH Deadline: 27 days

We have experience in developing SaaS, CRM/ERP systems, and complex web platforms using Laravel and Vue.js.

We propose to implement the project in stages, starting with the MVP. We recommend conducting a Discovery phase first to detail the requirements and form the technical specifications.

Stack: Laravel, Vue.js, PostgreSQL, Redis, Docker.

Estimated cost of MVP: from $40,000.

Timeline: 4–6 months (depending on the final set of functionalities).

We work in stages with payment after the completion of each stage. After agreeing on the requirements, we will prepare a detailed work plan, budget, and development schedule. Expand

Budget: 27000 UAH Deadline: 1 day

Good day, Margarita!

I see not a "website for a café," but a multi-tenant SaaS with a cash register, inventory, roles, and data isolation between establishments — this needs to be laid out from the first stage, otherwise the MVP will have to be rewritten.

What I will do in the MVP:

registration of the owner, several establishments, employee roles;
catalog (categories, products, modifiers, sizes/options);
cash interface, changes, payments, returns/cancellations;
basic inventory + sales history + reports;
customer loyalty;
admin panel of the service + rates/limits;
responsive for tablet/laptop/phone;
UI/UX for MVP (separately or as part of stage 1 — as we agree).
Stack: Node.js/TypeScript + PostgreSQL + React (PWA for cash register), multi-tenant with data isolation, clean architecture for further growth (fiscalization, receipts, mobile application).

Work format: staged, payment for completed stage + demo.

architecture + design of cash register/admin panel
core: auth, establishments, roles, catalog
POS + changes + payments
inventory, reports, loyalty, rates
Post-release support: separately, from X USD/month.

I can show relevant cases (SaaS / accounting systems) and break down the budget by stages in private messages.

Ready to start after a short call about MVP priorities. Expand

Budget: 27000 UAH Deadline: 10 days

Good day!

We have experience in developing SaaS platforms, CRM/ERP, and business automation systems.

We can implement an MVP with support for multiple independent establishments, isolated data, a POS interface, inventory management, user roles, sales, reporting, a loyalty program, and an admin panel.

We will propose an optimal stack, develop UI/UX for the MVP (or use an existing design system), and also provide the source code and documentation. We work in stages with testing at each stage and are ready to provide further support and development of the service.

Budget: 27000 UAH Deadline: 21 days

Good day!

I have reviewed the specifications — the task is clear: a multi-tenant SaaS for coffee shops with client data isolation, pricing plans, and full POS functionality for the MVP.

Backend on Node.js (DDD, Clean Architecture) with PostgreSQL — tenant isolation through separate schemas or tenant_id with row-level security, Redis for caching balances and cash register sessions. Frontend — React/Next.js with responsive design for tablet/laptop/smartphone, a separate panel for the establishment owner and an admin panel for the service. Stripe for subscription billing (recurring billing).

I have similar experience: in the booking service https://web.rstays.com, I implemented multi-tenant logic, roles, and calculations from scratch (fully backend + half of the frontend). Cash register, changes, inventory, and reports — a typical domain model that fits well with DDD, providing flexibility for further expansion (delivery, reservations, API for integrations).

It is better to take the design for the MVP as a separate quick iteration — I will adapt ready-made UI kits for the POS to the brand, which is faster and cheaper than full design from scratch.

For an accurate cost, timelines, and team composition, a breakdown of the MVP into stages is needed — I suggest discussing this on a call, and I am ready to work in stages with payment for the completed stage.

Portfolio: https://web.rstays.com / https://ai-desk.ai / https://momicro.com
GitHub: https://github.com/axbuglak

Sincerely, Buglak Oleksiy Expand

Budget: 320000 UAH Deadline: 150 days

Hello.
The team consists of developers, designers, and managers.
We have created an accounting system for a beverage factory. I can send a demo.
Stack - Laravel + Vue.
MVP - starting from $8,000, from 5 months.

Feel free to reach out.

Budget: 27000 UAH Deadline: 30 days

Good day!

I am interested in your project and I am ready to take on its execution. I have extensive experience in developing similar systems and admin panels - I am happy to help.

Here are the works I am NOT ASHAMED of:
1) Admin panels and CRM system modules
Behance

2) Telegram bot + admin panel
Behance

3) Development of an extension for Outlook:
Behance

Other works
Behance

Open to communication and discussion of details. Expand

Budget: 27000 UAH Deadline: 9 days

Hello! Your project is a classic SaaS Multi-tenant architecture (where 100% data isolation and scalability are required). We at Coderfy specialize in such systems.
Our relevant experience:
1. CortClub (Europe) — our own SaaS product for sports clubs. We are currently transitioning it to a multi-tenant architecture (data isolation for each client). It has revenue dashboards, analytics, and admin panels.
2. SaaS platform for fitness studios — managing schedules, subscriptions, clients, and owner offices.
3. FoodTech marketplace — orders, menus, dish modifiers, and online payments.

Our proposal for the MVP:
Stack: Node.js (NestJS) + React.js or Vue.js (ideal for a fast checkout interface) + PostgreSQL (database isolation).
Design: Since the specifications lack design, the first stage will be to develop a clickable UI/UX prototype for the MVP (checkout, owner office, super admin panel).
Team: PM, UI/UX Designer, Architect/Backend dev, Frontend dev, QA.

We work exclusively in phases (payment for completed sprints). All rights to the code will be transferred to you. Estimated timeline: 8–12 weeks.
The cost of development, support, and a detailed estimate can be provided after a quick discussion or specification detailing. We are ready to show demos of our SaaS products.
When would it be convenient for you to talk? Expand

Budget: 27000 UAH Deadline: 60 days

Hello, Margarita!
Thank you for the detailed project description.

We can implement a modern multi-tenant (Multi-Tenant) SaaS platform for automating the operations of coffee shops and small food service establishments.

The goal of the project is to create a proprietary software product with scalability, functional development, and further commercialization under a subscription model.

Our experience

We have experience in the development and enhancement of:

- SaaS platforms;
- ERP systems;
- CRM systems;
- internal corporate portals;
- business process management systems;
- web services with a multi-level access system;
- integrations with external APIs.

We pay special attention to architecture, scalability, security, and the potential for further product development.

Proposed technology stack

Frontend

- Nuxt 3 (Vue 3)
- TypeScript
- Tailwind CSS

Backend

- Laravel
- PHP 8.x
- REST API

Database

- PostgreSQL

Infrastructure

- Docker
- Git
- CI/CD

Proposed architecture

The system will be implemented as a Multi-Tenant SaaS with complete data isolation for each client.

The architecture includes:

- scalability;
- secure authorization;
- role-based access model;
- event logging;
- backup;
- the ability to add new modules without changing the core system.

MVP includes

- registration and authorization;
- creation of establishments;
- employee management;
- roles and access rights;
- product catalog;
- categories;
- modifiers;
- cash interface;
- sales processing;
- opening and closing shifts;
- various payment methods;
- returns and cancellations of sales;
- inventory accounting;
- write-offs of goods;
- sales history;
- reporting;
- loyalty program;
- pricing plans;
- administrative panel;
- adaptive web interface.

UI/UX

Since the design is currently absent:

Development of a complete UI/UX design in Figma.

Team

The following roles may be involved in the project implementation:

- System Analyst;
- UI/UX Designer;
- Backend Developer;
- Frontend Developer;
- QA Engineer;
- Project Manager.

Implementation stages

Stage 1

Business analysis

At this stage, the following is performed:

- detailing requirements;
- describing business processes;
- forming technical specifications;
- designing architecture;
- describing database structure;
- decomposing functionality;
- forming a project roadmap.

The result of this stage is a complete technical specification and an accurate budget and timeline estimate for development.

Stage 2

UI/U

Unfortunately, I can send a complete response in private messages due to character limitations.
Best regards, Tetiana. Expand

Budget: 27000 UAH Deadline: 90 days

Hello. I carefully read the description, the task is interesting, especially in the part of multi-tenant architecture and the cash interface with offline resilience on the tablet.

I have 3.5 years of commercial experience in fullstack development: TypeScript, Vue/Nuxt, NestJS, PostgreSQL. I have built B2B products with subscriptions, role segregation, and data isolation between clients, so I understand what is important to lay down from the very beginning to avoid redoing it later. For such a SaaS, I am familiar with the concept of "rate plans with limitations" and the admin panel for the service owner; this is not an abstraction, but specific modules that I have implemented.

My approach to work: clean architecture, DI, documentation during development, not after. For an MVP with such a set of features (catalog, changes, inventory accounting, loyalty program), it is important to immediately break it down into independent modules to easily scale for new clients later.

I am ready to discuss the details, the approach to developing the MVP, and estimated timelines.

Budget: 26999 UAH Deadline: 123 days

I will take it. I specialize in the development of web services, custom office software, mobile applications, and integrated solutions. I have over 15 years of full-stack experience — exactly the experience and expertise needed for your project. I work quickly, and colleagues are on standby. I am a sole proprietor, we will sign a contract, provide warranty support, and train staff. Realistic deadlines and budget - during negotiations, please write in private messages. You are welcome.

Budget: 27000 UAH Deadline: 20 days

Hello! For a commercial SaaS, it's crucial to properly establish multitenancy and data isolation from the first line. Redesigning the separation of entities on a live database, where other people's money and sales are already involved, is expensive and risky, so I will incorporate row-level isolation by tenant_id and secure handling of financial and personal data into the architecture right away.

I propose the following stack: backend Python/FastAPI with PostgreSQL (row-level isolation), frontend React, responsive for tablets, laptops, and smartphones, all in Docker for scalability. The code is structured, with documentation, and the rights to it will be yours after payment, as you wish.

I work in stages with payment for each completed stage. The first stage would create a core that can already process sales: owner registration, entity, roles, catalog with modifiers, cash interface, and changes. Then separately, inventory and write-offs, reports, loyalty, tariffs, and service admin panel.

Honestly about experience: instead of someone else's ready-made POS, I suggest you judge us by this first stage. You will quickly see a working multi-user core on real code and decide on it.
I would be happy to collaborate.

Budget: 27000 UAH Deadline: 60 days

Good day!

I am interested in your project for developing a SaaS system for automating the work of coffee shops and small food service establishments.

I have experience in developing business applications, CRM systems, and complex web interfaces with large amounts of data and various access levels. I have worked on internal systems where I implemented data management, business logic, personal accounts, API integration, and workflow optimization.

For the MVP, I propose the following stack:

Frontend:

* React / Next.js
* TypeScript
* Tailwind CSS or SCSS
* Zustand / Redux

Backend:

* Node.js + NestJS
* PostgreSQL
* Prisma ORM
* REST API

**Additionally:**

* Docker for deployment
* JWT/OAuth authorization
* Role Based Access Control (roles and access rights)
* architecture considering further scaling of the SaaS product

Within the MVP, I can implement:

* registration and management of establishments;
* roles and employees;
* catalog of products, categories, and modifiers;
* cash register interface;
* sales, returns, and order cancellations;
* opening and closing cash shifts;
* basic inventory accounting;
* transaction history;
* sales reports;
* pricing plans and limitations;
* administrative panel for the service owner.

Estimated cost of MVP:
$3000–5000

Development timeline:
2–4 months (phased with regular demonstration of results).

Development stages:

1. Project architecture, authorization, multi-organization structure.
2. Core CRM/POS functionality.
3. Inventory, sales, reports.
4. Pricing, administrative panel, preparation for launch.

I am ready to work in phases with payment for each completed stage.

After launch, I can provide further support and development of the product.

I am ready to discuss the project details, prepare a technical description, and clarify the estimate after a more detailed review of the requirements.

I look forward to collaborating! Expand

Budget: 98000 UAH Deadline: 14 days

We already have a practically ready foundation of a similar SaaS for roles, cabinets, accounting, inventory, payments, and reports, which can be quickly adapted for coffee establishments and launched in the first phase here on the marketplace.
For the complete MVP with the described scope, I would estimate 820,000-1,200,000 UAH and 12-16 weeks, as this is not a simple cash register, but a multi-client product with tariffs, inventory, finances, access rights, and personal data security.
For 27,000 UAH, it seems that only a very limited technical start or part of the prototype can be done.
It is important not to copy Poster, but to build our own architecture where the data of each establishment is isolated, and rights, tariffs, and financial actions are embedded from the first version.
I see the stack as follows - Next.js, React, NestJS, PostgreSQL, Redis, Docker, PWA for tablets, a separate journal of financial actions, and a queue for future integrations.
The team - architect, business analyst, designer, backend, frontend, tester, and project manager.
The cost of the first phase of 98,000 UAH includes the technical specification, database schema, roles and tariffs map, prototype of key screens, MVP decomposition, and accurate development estimation.
We are ready to conduct development in stages - after each stage, there will be a demonstration, code transfer, and payment for the accepted result.
Support after launch - approximately from 35,000 UAH per month, depending on the number of integrations and response speed.
- https://business.ingello.com/forma-wms - inventory accounting, movement of goods, roles and balances, close to your block of write-offs and inventory
- https://business.ingello.com/forma-crm - cabinets, clients, roles, reporting, and complex business logic for a corporate system
- https://business.ingello.com/vorfahr - SaaS with payments, QR pages, and automation, as a strong example of a product approach
About us and our approach - https://systems-fl.ingello.com/ua
Question - is real fiscalization and receipt printing needed in the MVP, or is internal sales without integrations sufficient for now?
Question - is one type of establishment planned for the start, or should different models be covered from the first version - coffee shop, café, kiosk?
Once you respond to these two points, we can detail the boundaries of the MVP and agree on the first short phase. Expand

Budget: 27000 UAH Deadline: 10 days

Hello.

I will create your MVP using the following technology stack:

Next.js (Front-end) + Tailwind CSS/SCSS + Supabase (DB) + Node.js (Back-end)

The reason is that the technology stack I recommend is the most sensible considering future scalability, SEO, and reliable security.

You can view my previous work using this stack in my portfolio.

I would be happy to work with you on your project. Expand

Budget: 27000 UAH Deadline: 20 days

We are Benefit Studio, a team specializing in the development of SaaS platforms, CRM/ERP systems, marketplaces, and high-load web services. We understand the specifics of multi-tenant architecture and create products ready for scaling and commercial launch.

What we offer:

UI/UX design from scratch (or a quick MVP solution) considering the scenarios of cashiers and owners.
Designing a scalable SaaS architecture with data isolation for each establishment.
Development of MVP: POS, inventory management, products, roles, reporting, loyalty program, pricing plans, admin panel.
Preparing the system for further development: mobile application, integrations with payment terminals, fiscal services, CRM, and API.
Complete technical documentation, transfer of source code, and warranty support.

Recommended stack: React / Next.js, NestJS, PostgreSQL, Redis, Docker, AWS/Hetzner.

We work in stages with payment after the completion of each stage, ensuring transparency of the process and quality control.

We are ready to discuss architecture, implementation stages, timelines, and budget, and propose an optimal solution for creating a competitive SaaS product. Expand

Budget: 50000 UAH Deadline: 40 days

🌟 Hello! I am ready to take on your task and provide the necessary technical support. I would be happy to discuss the details of our collaboration and start working.
🏆 Portfolio: Freelancehunt

I am glad to see you among my clients now and in the future.

Budget: 27000 UAH Deadline: 100 days

I have a working prototype - a desktop system - but all the logic is implemented (I have a very good command of the subject area). Work of waiters, kitchen, bar - screen notifications to the kitchen, calculation cards and write-offs in production, working with POS systems and QR payments for tables from Monobank (expirienza), my own PRRO, bonus system, work on tablets / and much more.

https://youtu.be/PRVnOcXuBOQ

Budget: 27000 UAH Deadline: 50 days

Hello. My name is Alexey, and I represent a group of developers – NC-1. For over five years, we have been creating websites, mobile applications, online stores, ERP/CRM systems, and other e-commerce products.
Examples of such work: https://freelancehunt.com/showcase/work/arriv-korporativnaya-programmnaya-platforma-klassa/1949831.html
https://freelancehunt.com/showcase/work/fiorino-programmnoe-obespechenie-dlya-upravleniya/1949804.html
I offer our team and stack:
Frontend developer — React (Next.js), TailwindCSS
Backend developer — Node.js (NestJS), PostgreSQL
DevOps engineer — Docker, GitLab CI/CD, Redis, AWS / Yandex.Cloud
UI/UX Designer — Figma
QA engineer — manual testing tools, Postman (for API), Cypress (for automated tests)
Preliminary cost and timeline: 715,000 UAH, 50 working days
The cost of further support - from 5,000 UAH
Are you ready to work in stages with payment for each completed stage - we are ready.
Sincerely, Alexey M. Expand

Budget: 27000 UAH Deadline: 20 days

Hello! 💛 I present to you your digital partner Confidence Technology. We will create it "turnkey" based on your sample, with extensive experience. 🎯 Part of our projects: https://dotpilot.cz ✔️ https://boostylabs.com ✔️ https://domainsforequity.com ✔️ https://omgfirms.com ✔️ https://sweet-sdpearls.de ✔️ https://homenly.com ✔️ https://novobudova.pro ✔️ https://idstech.org ✔️ https://skyhigh-lviv.com ✔️ https://mathmystica.com ✔️ https://aquahub.org.ua ✔️ https://emporio-sports.cz ✔️ https://www.gloriasanatoriy.com.ua ✔️ https://ol.zp.ua

Budget: 27000 UAH Deadline: 3 days

Question: Are you planning to isolate the data of institutions through a shared database with tenant_id or separate schemas for each client? For the MVP, I suggest Node.js/PostgreSQL + React: modules for cash register, shifts, inventory, loyalty, and RBAC for roles. I am ready to work in stages, with payment for each block. I will prepare the architecture and budget for the MVP in 3 days.

Budget: 27000 UAH Deadline: 1 day

Hello! I have a team of developers who specialize in complex SaaS platforms and microservices, so we are ready to design a secure multi-tenancy architecture and a fast, adaptive interface for point of sale systems from scratch.

Budget: 27000 UAH Deadline: 30 days

Good day!

I am interested in your project for creating a SaaS system for automating coffee shops.

I am ready to implement the product in stages: first, to develop an MVP for one or several test coffee shops, and after verifying the processes — to scale the system.

The basic MVP may include:
— separate accounts and roles for establishments and employees;
— product catalog / technical cards;
— inventory and write-off accounting;
— purchases and suppliers;
— staff tasks;
— reports and key analytics;
— a foundation for integration with the POS system.

For an accurate estimate, it is important to clarify which modules are a priority in the first stage, whether integration with a specific POS system is needed, and how many establishments are planned to be connected at the start.

I can propose an architecture, break down the functionality into stages, and develop the system with a margin for further scaling. Please send a complete description or a screenshot of the technical specifications — then I will prepare a specific estimate for timelines and budget. Expand

Budget: 27000 UAH Deadline: 30 days

Good day! We have experience in creating complex automation systems for HoReCa. We implement this through a modular architecture on Node.js and React, which ensures scalability and stability. We will develop a unique interface and accounting logic tailored to your business processes, with an emphasis on the speed of the cash register. We are ready to discuss the details of the technical assignment.

Budget: 27000 UAH Deadline: 125 days

Good day. I am ready to develop an MVP of a SaaS system for automating coffee shops with a custom architecture.

I have experience in developing web services with multi-user architecture, roles, dashboards, data accounting, and administrative panels. For this project, I propose the stack Next.js + MongoDB, which is well-suited for SaaS solutions due to rapid development, flexible data structure, and scalability.

In the MVP, I can implement:

* user authentication, establishments, and user roles;
* a catalog of products, categories, and modifiers;
* a POS interface for sales;
* cash changes, payments, and returns;
* inventory accounting and balances;
* sales history and basic reports;
* a loyalty program;
* tariff restrictions and a SaaS admin panel.

I propose to carry out the development in stages with payment for completed stages. I can also assist with UI/UX (design) for the MVP (strategically important features) or implement it based on an existing design system.

Estimated MVP: 3–5 months of development (depending on the detail of functionality and design). After launch, further scaling, support, and product development are possible.

I am ready to discuss the detailed technical specifications, architecture, and provide an accurate estimate after clarifying the priorities of the first version. Expand

Budget: 27000 UAH Deadline: 40 days

Hello!

I am interested in your project. I have experience in developing complex web applications, CRM-like systems, and SaaS solutions with multi-tier architecture, authorization, user roles, REST API integration, and business logic implementation.

For the MVP implementation, I propose a modern stack:

* Frontend: React + Next.js + TypeScript
* Backend: NestJS + PostgreSQL
* ORM: Prisma
* Redis for caching and queues
* Docker for deployment
* AWS or DigitalOcean for hosting
* JWT + RBAC for a secure authorization system
* Multi-tenant architecture with complete data isolation for each establishment.

The MVP may include:

* registration and authorization;
* management of establishments, employees, and roles;
* catalog of products, categories, and modifiers;
* POS interface;
* cash changes;
* sales, returns, and various payment methods;
* inventory accounting;
* reports;
* loyalty program;
* admin panel;
* pricing plans and subscriptions;
* responsive interface for tablets, laptops, and smartphones.

During development, I pay special attention to scalable architecture, code quality, data security, and the ability for further product development without significant rework.

Preliminary MVP estimate:

* timeline: 3–5 months;
* budget: starting from $5,000 (final estimate after agreeing on detailed specifications and feature priorities).

I am ready to work in phases with payment after the completion of each phase, provide technical documentation, and ensure further support and development of the product.

I would be happy to discuss the project, help formulate the MVP roadmap, and prepare a detailed implementation plan. Expand

Budget: 27000 UAH Deadline: 120 days

Hello! I have reviewed the task. This is a serious SaaS project that requires laying the correct architecture from day one; otherwise, it will simply collapse when scaled.

I am a developer specializing in complex backend systems, databases, and business process automation.

Answers to your questions:
1. Technology stack:
I propose a reliable stack that thousands of SaaS solutions operate on: PHP, Laravel, MariaDB, Docker. To meet your requirement for data isolation, a Multi-Tenancy architecture will be used (each client's data is stored in an isolated environment under the hood of a single application). For the point of sale (POS), we will use reactive technologies (Vue.js or Livewire), as the cash register needs to operate instantly and without page reloads.

2. Design for MVP:
To save your time and budget at the start, I suggest using a ready-made premium UI template (for example, Metronic) for the administrative panel (back office). However, the cash register interface (front office) should be developed custom, as UX for touch screens is critically important there.

3. Cost and timelines:
The MVP you described is a very extensive V1.0.
- Timelines: Approximately 2.5 - 4 months.
- Cost: From $5,000 to $8,000 (final estimate after discussing details and approving the database structure).

4. What is included in the cost:
Architecture and database design, backend development, frontend development (POS + admin panel), server infrastructure setup (Docker containers), and deployment on your server. The rights to the code, of course, belong to you.

5. Work format:
I fully support phased development (sprints of 2-3 weeks). For example: core and authorization development -> catalog -> cash module -> reports. Payment for each completed and tested phase.

I am ready to discuss technical nuances (in particular, how the offline mode of the cash register and work with the fiscal cash register will be implemented in the future). I look forward to your feedback! Expand

Budget: 27000 UAH Deadline: 1 day

Hello, I have worked directly with the poster (as a developer) – I have a deep understanding of how to develop and design similar systems.

Stack: Typescript system (React front + Electron, backend on Nest with PostgreSQL)

I suggest discussing all other questions in private.

Best regards, Oleksandr

Budget: 27000 UAH Deadline: 60 days

Good day. I read the specifications carefully — this is not "just another CRUD with products and reports." Three things determine whether the MVP will need to be rewritten in six months:

1. The cash interface must work offline. If the internet goes down in the café — sales cannot stop. This involves local order storage and synchronization, not just a regular web app that "freezes" without a network. Most MVPs fail here, in the real environment.

2. Data isolation between establishments — at the database level (row-level security in PostgreSQL), not at the code level. For financial data, this is not optional.

3. Fiscalization. Formally, this is "for later," but starting from August 2025, all transitional benefits regarding the PRRO will be canceled, and a café without a fiscal receipt will face fines. The sales model, changes, and returns need to be designed for PRRO (Checkbox / Vchysno.Kasa) from the start; otherwise, this layer will have to be completely rewritten.

The rest — catalog, modifiers, changes, reports, tariffs, loyalty — is understandable in terms of workload.

Tech stack for the task: React/Next.js + NestJS/Node.js + PostgreSQL, responsive for tablet, laptop, and smartphone.

I can assemble a working prototype of the cash screen in a couple of days: you open it on a tablet, process an order, open and close a shift — and it works even without the internet. To demonstrate the approach in practice, not just in words. Message me privately — I’ll send the details and show you. Expand

Budget: 26990 UAH Deadline: 29 days

Good day.

My name is Valentyn, and I represent ACW Soft Solutions. We can take your project into work and offer not just development, but a proper approach from task analysis to the launch of the finished solution.

To avoid giving a general answer, I suggest we first briefly clarify your goals, functionality, and expectations regarding timelines. After that, we can propose a clear work plan, an approximate estimate, and the next steps.

I can also send examples of similar work in private messages and quickly discuss the details.

Portfolio: Freelancehunt

Budget: 27000 UAH Deadline: 20 days

Hello ⭐️! I am a highly qualified web developer with over ✅ 7 years of experience in development and modern web technologies.

Recent projects:
✔️https://homenly.com
✔️https://confidence-tech.com
✔️https://homexcrm.com
✔️https://omgfirms.com
✔️https://skyhigh-lviv.com/
✔️https://sweet-sdpearls.de/
✔️https://novobudova.pro
✔️https://aquahub.org.ua
✔️https://boostylabs.com
✔️https://ol.zp.ua
✔️https://emporio-sports.cz

My stack includes:
✅ Frontend: HTML, CSS, JavaScript, React.js, Vue.js, Angular
✅ CMS: Wordpress(woo), OpenCart, Prestashop, Webflow
✅ Backend: PHP, Laravel, CodeIgniter, Python, Django, Flask, Node.js, Next.js
✅ Databases: MySQL, PostgreSQL
✅ Other skills: Git, API integration

Why choose me?
✔️ Fast and quality execution: Your tasks will be completed on time and with impeccable quality.
✔️ API integration: Need seamless integration of third-party APIs? I will take care of that.
✔️ Custom solutions: I take your ideas and turn them into successful web solutions tailored to your business needs.

Let's collaborate and create something amazing together! Expand

Budget: 27000 UAH Deadline: 42 days

The main challenge in creating a commercial SaaS POS system is the risk of laying a weak architectural foundation at the start. Using builders or inappropriate CMS will lead to critical performance drops under load, delays in synchronizing stock levels, and mixing data from different clients. When the system handles real sales, even a second's delay at the register or a database failure results in direct financial losses for the establishment.
As a Senior Full-Stack engineer with experience in designing fault-tolerant SaaS platforms, I propose to develop a clean, scalable architecture from scratch that guarantees 100% data isolation (Multi-tenancy based on Row-Level Security in PostgreSQL) and flawless interface operation.
Professional architectural solutions for your MVP:
PWA (Progressive Web App) as the foundation: For the MVP cash register interface, this is the ideal choice. We develop a web application that installs on a tablet or smartphone with one click, bypassing the App Store / Google Play. This saves the budget on mobile development and allows the use of the device's hardware capabilities.
Offline-first architecture: To ensure uninterrupted operation of the cash register area during unstable network connections, we implement local caching of transactions. The register operates completely autonomously, storing data in the browser's local storage (IndexedDB/RxDB) via Service Workers. When the connection is restored, seamless background synchronization with the server occurs (Eventual Consistency).
Optimal stack:
Frontend: Next.js (React) + Tailwind CSS (cash register interface and owner panel).
Backend: Node.js (NestJS) + TypeScript (high transaction processing speed and queues).
Database & Cache: PostgreSQL + Redis (data isolation for each establishment by tenant_id and fast session caching).
Commercial terms (MVP):
Estimated cost of MVP: $2,500 – $3,500 USD (depending on the detail of inventory accounting). Development time: 6–8 weeks (broken down into weekly sprints with demonstrations of working software).
Payment format: Milestone-based, exclusively for completed and tested modules.
Result: A ready-to-launch product, installation PWA package, Docker configurations for easy deployment, documentation, and full transfer of rights to the code.
You can familiarize yourself with my architectural approach on my website: https://mcarrow.online
I suggest holding a short meeting on Zoom / Google Meet to discuss the database structure and cash register interface.
Best regards,
Serhiy Expand

Budget: 27000 UAH Deadline: 100 days

Good day!
I have reviewed the technical specifications. By description, this is a full-fledged multi-user SaaS product with a POS system, inventory management, reporting, and the potential for further scaling. Such a project requires the correct architecture from day one, so that a mobile application, integrations with PRRO, payment terminals, and other services can be added later.
1. Experience
I have commercial experience in developing complex web applications using Java and Spring Boot, designing REST APIs, working with PostgreSQL, Spring Security, Docker, CI/CD, as well as designing modular architecture; in particular, I have worked on banking products. I have not directly developed a POS system at the level of Poster before, but I have sufficient experience to design a similar system and am ready to develop it step by step.
2. Proposed stack
Backend: Java 21/25, Spring Boot, Spring Security, Spring Data JPA, PostgreSQL, Flyway, Redis (if needed), Swagger
Frontend: Angular
Infrastructure: Docker, deployment on VPS or cloud platform as agreed with the client.
For the MVP, I recommend a modular monolith with the possibility of later separating individual modules into microservices. To support many independent establishments, a multi-tenant architecture with data isolation for each client will be implemented.
3. Team composition
I can carry out the project independently or work in a team involving a UI/UX designer and QA if needed.
4. Estimated cost of MVP
The described functionality significantly exceeds the classic understanding of MVP. To obtain a realistic estimate, I recommend starting with a short Discovery phase to define business processes and create a list of features specifically for the first release. After that, a detailed cost estimate, timelines, and development plan for each module will be prepared.
5. Estimated timeline
The timeline depends on the final version of the MVP. Preliminary: MVP - 3-5 months, full implementation of all features from the technical specifications - up to 12 months (depending on priorities and the scope of the first release).
6. What is included in the cost
requirements analysis;
architecture design;
database design;
backend development;
frontend development;
testing;
technical documentation;
deployment of the system on the client's server;
transfer of all source code and rights to it.
7. Further support
I am ready to provide technical support, develop functionality, and implement new modules after the system launch. The terms of support can be agreed upon separately (hourly payment or fixed monthly fee).
8. Phased development
Yes, I am ready to work in phases. I believe this approach is optimal for a SaaS project. Expand

Budget: 27000 UAH Deadline: 31 days

Ready. Response to the task:

Hello!
Experience: I have not previously worked with a direct POS or ERP system, so I want to be honest about that right away. However, I have relevant background that directly applies to your case:
FastAPI backend with an admin panel for real-time monitoring (a project with data processing, roles, triggers, reports) — https://github.com/kamedashe/Avia-Navigation-Data-Pipeline-Admin-API
Telegram bot with role separation (admin/user), application moderation, mailings, and content management through an admin interface — https://github.com/kamedashe/viknadomi
Docker/Docker Compose for containerization and reproducible deployments, real-time logic through Socket.io/WebRTC.
So, authorization, roles, database, admin panel, real-time — I have already gone through this multiple times, just in different domains.
Stack: Node.js + TypeScript (NestJS/Express) on the backend, PostgreSQL with data isolation by tenant_id (row-level security) — this is sufficient for the MVP, and as it grows, we can switch to schema-per-tenant. Frontend — React, responsive for tablet/phone/laptop right away.
Team: I work solo, managing the full cycle (backend, frontend, database, deployment) myself.
Regarding the price honestly: all the listed functionality (multi-tenant + cash register + warehouse + loyalty + tariffs + service admin panel) — this is not a project for 27,000 UAH, realistically more, in several stages. I understand that 27,000 is more of a budget display limit on the marketplace, so I suggest breaking it down:
Stage 1 (27,000 UAH, ~3-4 weeks): registration/authorization of the owner, creation of the establishment, catalog of products/categories/modifiers, cash interface, opening/closing shifts, one payment method, returns/cancellations, basic inventory accounting, sales history.
Stage 2 (separate assessment after stage 1): multi-tenant isolation for scaling, loyalty, tariffs, and service owner admin panel, extended reports.
Payment by stages — yes, I am ready. Support after delivery — separately: hourly (from 500 UAH/hour) or a fixed monthly package.
I prepare technical documentation along with the project.
If the approach is okay — we will discuss the details of the catalog/modifiers and finalize the technical specifications for stage 1. Expand

Budget: 27000 UAH Deadline: 30 days

I am a NextJs, React, NestJs developer. I am ready to take on this task.

Budget: 27000 UAH Deadline: 30 days

Hello! This is a large and very interesting challenge. Developing a proprietary SaaS product for HoReCa is a task that requires laying down the correct multi-tenant architecture from day one for 100% data isolation for each client and stable scaling to hundreds of establishments.

I specialize in complex custom web services, CRM, and accounting systems, so this project perfectly fits my profile.

1. Experience (custom development):

my-fitness-club.com (custom CRM, multi-level access, PWA)

habpro.agency

artmastermops.net.ua

holydrip.com.ua

2. Design solution:
Since there is currently no design, for the MVP we will generate UI/UX using modern AI tools. This will allow us to obtain a convenient, intuitive interface much faster and immediately move to the stage of direct code development.

3. Technology stack:

Frontend (Cash Register + Admin Panel): Next.js (React), TypeScript, Tailwind CSS.

Backend: NestJS, Node.js.

Database: PostgreSQL, Prisma ORM.

This is just the foundation—under the hood, many more modern solutions and libraries will be used to ensure absolute security of financial data and system performance.

4. Team composition:
I will handle all development (architecture, databases, backend, frontend) entirely on my own.

5. Work format and stages:
The cost of the MVP includes: architecture design, development of all declared functionality according to the specifications, testing, server setup, and handing over all source codes and rights to you.

I work on a milestone payment basis (sprints). We break the MVP into logical blocks (for example: 1. Authorization and establishment creation; 2. Cash register; 3. Inventory and reports). You accept the stage—after that, payment occurs. Further support is possible after the release.

I am ready to discuss the details (depth of inventory accounting, technological maps) in a short call, after which I will be able to provide the exact cost and timeline for the MVP. Message me! Expand

Budget: 27000 UAH Deadline: 30 days

Hello!

I am a Full-Stack Software Engineer with over 7 years of experience in developing websites, SaaS solutions, complex web platforms, and MVPs for startups - from idea and architecture to production and support.

I work not only as a developer but also with a focus on business logic, scalability, and long-term support of solutions. My portfolio includes examples of completed projects of varying complexity.

Technology stack:
PHP (Laravel, Symfony, Yii2),
Frontend: JavaScript (Vue.js, React.js), HTML5, CSS3,
Databases: MySQL, PostgreSQL.

Regarding timelines and costs - at this stage, it is difficult to accurately assess them without clarifying the requirements. To form a reasoned estimate, it is usually necessary to understand:
- project goals;
- key functionality;
- expected load and integrations;
- priorities (quick launch vs scaling).

I suggest starting with a brief clarification of requirements or a call/email - after that, I will be able to provide a realistic estimate on timelines, budget, and implementation options.

I would be happy to discuss the details. Expand

Budget: 27000 UAH Deadline: 30 days

Good day!

With over 7 years of commercial development experience, in recent years I have been building exactly what you need: a multi-tenant SaaS system for a network of establishments (club management) — billing and subscriptions, recurring payments, cash operations and changes, refunds, tariff plans with restrictions, roles and employee rights, reporting. In other words, the domain of "money + accounting + client data isolation" is my daily work, not a new area for me.

Budget: 27000 UAH Deadline: 40 days

Hello. I am ready to develop your SaaS system for coffee shops. I have experience in creating multi-user CRMs and accounting systems with data isolation and secure architecture, examples of which I will send in private messages due to NDA restrictions. I propose using Python for the backend with a PostgreSQL database and React for the frontend, which will allow for easy product scaling and prepare a reliable API for future integrations. Since the design is currently absent, the work will start with UI/UX in Figma, where the interaction logic, cash interface, and admin panel will be thought out, built on a flexible component system. The team will include a UI/UX designer, backend, and frontend developers. The estimated cost of developing the MVP will be around $8,000, and the implementation period will take approximately three months, which includes project planning, design creation, coding, testing, and delivery of technical documentation. The cost of further support is discussed individually, usually at a fixed hourly rate. I fully support a phased work format, breaking the project into logical parts and payment for each successfully completed phase. I would be happy to discuss the details and start working.

Budget: 90000 UAH Deadline: 90 days

Good day.
I offer myself as a backend developer. I have over 10 years of experience in development.
I see the backend on Laravel, and it will be connected to the frontend via REST API.
(A separate programmer is needed for the frontend!).
This is a fairly serious system, so I realistically see a working version no earlier than 4 months.
Starting from 90,000 UAH. Stage-by-stage/monthly payment is possible. Or hourly ($10/hour).

Budget: 27000 UAH Deadline: 27 days

Hello.

I can take on the development of such a SaaS product; this is no longer just a website or an internal system, but a full-fledged multi-user service for food establishments, where it is critically important to immediately lay the architecture correctly, isolate data between clients, define roles, pricing, security, and a foundation for future scalability. In similar projects, the biggest mistake is to gather an MVP without considering future growth, and then rewrite the cash register, inventory, reports, and subscription logic almost from scratch.

We have a team and experience in developing complex web systems, admin panels, business logic, and SaaS solutions, so we can assist with both the design of the MVP and the phased implementation of the product with separate assessments for design, development, and documentation.

Please write to us in private messages for a detailed discussion of the project and to provide information regarding the timeline and cost of such a project.

Have a great day, and we look forward to your message!

Budget: 27000 UAH Deadline: 30 days

Good day, I am engaged in the development of similar resources, have experience in writing my own CRMs, and large management system projects for over 8 years. Recently, I completed a SaaS product, details I can describe in private, which we did step by step. We can discuss the budget depending on the stages of work. Technology stack: Frontend on React (TypeScript + shadcn ui), backend Laravel. (WebSockets PostgreSQL Redis Meilisearch etc.)

Budget: 27000 UAH Deadline: 28 days

Hello! I have reviewed the technical assignment. The functionality you described is my main area of expertise. I specialize in designing and developing complex custom CRM/ERP systems, accounting systems, and turnkey SaaS platforms.

I have extensive practical experience in creating architectures with complete user data isolation (Multi-tenancy), automating financial accounting, and analytics.

My relevant experience (portfolio examples):
Custom ERP/CRM system for a medical clinic
Analytical CRM/ERP accounting system (Cow Farm)
Frontend SaaS AI platform for digital employees (BinomAI)
CRM system for accounting and financial analytics for GameFi
Development of an international e-Commerce ecosystem for the ASBIS holding
Custom CRM/SaaS platform with AI generation and Real-Time chat

Proposed technology stack (for high loads and scalability):

Backend: Python (FastAPI / Celery) — will ensure maximum request processing speed, asynchronicity, security of financial data, and easy scaling for thousands of establishments.

Frontend: React.js / Next.js or Vue.js / Nuxt — to create a fast, responsive (tablet/smartphone) and interactive cash interface that works without page reloads (SPA/PWA)

Database & Infrastructure: PostgreSQL (for strict data isolation and financial transactions), Redis (for caching and task queues), Docker / Docker Compose (for stable deployment and isolation of microservices).

UI/UX Solutions for MVP: Since the design is absent, I propose to implement the interface based on a professional, responsive UI kit (Tailwind CSS / Shadcn UI). This will save up to 30-40% of the budget at the MVP stage and launch the product significantly faster, achieving a modern and clean design.

I act as a Senior Full-Stack Engineer. I write all the code myself, which ensures the integrity of the architecture, absence of desynchronization between the backend and frontend, and high development speed without unnecessary bureaucracy.

Communication format: I work completely asynchronously. Always available, clearly documenting tasks and delivering the final result according to the technical assignment.

Estimated cost, timelines, and stages:

Estimated MVP development time: 30–45 days (depending on final approval of the technical assignment).

Estimated cost: My rate is $20 per hour. I am ready to discuss a fixed budget for each MVP stage.

What is included in the cost: Database architecture design, writing clean code (backend + frontend), UI kit integration, basic testing, technical documentation (API description and structure), and deployment on your server.

I am ready to start discussing the detailed technical assignment. Expand

Budget: 27000 UAH Deadline: 30 days

Good day, Margarita
I am ready to develop this system.
I will complete the main functionality within 20-25 days.
Message me privately, and we will discuss the details. I have developed a similar system for a company that does business lunches. + integration with Telegram bots was included.

Budget: 27000 UAH Deadline: 33 days

Hello!
I have been programming for 16 years.
I created a similar system for a grocery store - inventory management, connecting scales, a barcode database, suppliers, stock, debts, analytics, fiscalization of the cash register, various payment methods, etc.
I also wrote similar software for a manufacturing company.

I have experience and am ready to help!

Budget: 27000 UAH Deadline: 10 days

Good day.

I have over 15 years of experience in web development and more than 10 years of working with CRM, ERP, and multi-user systems.

Your project brief essentially involves creating a full-fledged multi-tenant SaaS product at the level of Poster POS, so I will immediately note that implementing a quality MVP requires phased development and detailed architectural design.

Proposed stack:
• Backend: Laravel 12 / PHP 8.3
• Frontend: React or Vue 3
• Database: PostgreSQL
• Redis for queues and caching
• REST API
• PWA for the cash interface on tablets
• Multi-tenant architecture with complete data isolation for establishments.

The first phase of the MVP may include:

registration and authorization;
management of establishments and employees;
catalog of products and modifiers;
cash module;
inventory accounting;
reporting;
tariff plans and admin panel.

After the MVP launch, we can move on to integrations with fiscal services, terminals, mobile applications, and APIs for third-party systems.

I am ready to work in phases with payment after the completion of each phase, prepare technical documentation, and transfer all rights to the source code.

For a more accurate assessment, it is necessary to clarify the business processes and form a detailed project brief or conduct a short discovery phase. Expand

Budget: 27000 UAH Deadline: 14 days

I see that the main challenge here is not the cash register itself, but the multi-tenant architecture with clear data isolation for each establishment; this is the part where it's easiest to make a mistake that can be costly later. I will create the backend in PHP/Laravel with a role model (owner, cashier, service admin), a product catalog with modifiers, cash register logic, inventory management, and reports on changes and revenue, while adapting the frontend for tablets, laptops, and smartphones. Please let me know what features you want to see in the first release: just the cash register and inventory, or also a loyalty program with reporting?

Budget: 27000 UAH Deadline: 10 days

Hello! I will complete your task quickly and efficiently. I have experience working with a similar system. I created a complex system on ERP.

My recent works:
https://indexfast.pro - fast website indexing
https://mono-bank.pp.ua - everything about Monobank
https://mamamia.pp.ua - online store
https://programist.pp.ua/ua/portfolio/ - portfolio of works
https://monitortest.pp.ua - monitor testing
https://keytest.pp.ua - keyboard testing
https://pctest.pp.ua - computer testing
https://devroman.dev/portfolio/ - portfolio
https://vseetut.matviy.pp.ua - layout
https://indexfast.pp.ua - fast website indexing

My portfolio: https://freelancehunt.com/ua/freelancer/romas6ka.html#portfolio
Write to me, I will start working today. I will be glad to cooperate with you! Expand

Budget: 27000 UAH Deadline: 5 days

Hello! I am ready to complete the project turnkey. I guarantee quality and promptness of work.

Feel free to write, I will be happy to collaborate!

Budget: 27000 UAH Deadline: 3 days

Hello, have you already determined the key business processes that the MVP should address first? I can discuss the timelines and budget more precisely in personal correspondence.

Here’s how I propose to implement this project:
1. I will conduct a deep analysis of the requirements and design the database architecture with data isolation for each establishment.
2. I will develop the MVP using the Next.js stack (frontend) and Node.js/NestJS (backend) with a modular structure for future scalability.
3. I will create technical documentation and transfer full rights to the source code after payment for each stage.

Thank you for considering my proposal. I look forward to the opportunity to collaborate with you!

Budget: 27000 UAH Deadline: 14 days

The task is to build a multi-tenant SaaS-POS from scratch, where each coffee shop receives an isolated environment, a cash register interface, and reporting, while the service owner manages the pricing through an admin panel.

Stack for MVP: Next.js (App Router) + Node.js/NestJS on the backend, PostgreSQL with row-level security for data isolation between establishments, Prisma ORM. The front of the cash register interface is React with an offline-ready approach using IndexedDB in case of unstable internet at the establishment. Authorization via JWT + refresh tokens with role differentiation (owner, cashier, service admin).

The architectural solution that is really important here: single-database multi-tenant through RLS instead of separate schemas for each client — it scales cheaper to hundreds of establishments but requires strict testing for data leakage between tenants.

Please let me know if there is already any prototype or wireframe of the cash register interface, or are we starting completely from a blank slate including UI/UX?

Budget: 27000 UAH Deadline: 45 days

Margarita, creating your own SaaS for automating coffee shops requires a clear delineation of architecture for multi-tenancy. I understand that for the MVP, it is crucial to first establish a correct connection between the cash interface and inventory management to avoid desynchronization of balances.

I will propose a database development plan that will support scaling for a large number of establishments, and I will focus on the logic of the cash module to ensure it is fast even during stable operation in the browser. We will build the system so that the owner receives up-to-date reports in real time without overloading the server.

Do you already have ready-made interface mockups to assess the scope of the frontend part? What primary sales channel do you plan to integrate first after the MVP launch?