QR locker booking platform

Budget: 1700 USD Deadline: 30 days

Good day. I can implement this project turnkey, as I am well familiar with the specifics of integrating payment systems and hardware through APIs.

Your technology requirements fully match my tech stack. To build a reliable architecture and handle webhook requests from the bank, I will use Node.js along with Nest and a PostgreSQL database, and for background queues, I will add Redis. I propose to develop the client side using Next.js, which will allow for easy implementation of a fast mobile interface and support for the required languages. I will carefully work through the logic of the booking system and the failure scenarios when assigning cells.

Budget: 5000 USD Deadline: 12 days

Hello. I have extensive experience with React/Node.js. I am ready to collaborate. Please contact me.

Budget: 800 USD Deadline: 22 days

Hello.

I am a NodeJS developer. I have experience in developing booking systems and integrating various payment systems. I am ready to take on the task. Write to me, we will discuss.

Budget: 5000 USD Deadline: 60 days

Hello!

I like this collection because it has real logic, not just screens. The process based on a QR code that ends with the physical opening of the locker seems smooth only when the server side is reliable, so I would first focus on the state of the booking and payment confirmation for the locker, so you never have paid but unassigned or assigned but unpaid cases.

I would create it as a mobile web application with a Node.js server side and PostgreSQL, as well as a small queue for background tasks such as payment webhooks, email confirmations, locker retries, and clear rollback steps. For the locker side, I would add a simple reliability layer that keeps a short booking window on the server side and then confirms the assignment only after the locker API response, with automatic retries and a clear backup path that notifies the administrator if something looks wrong.

One memorable feature I would add is a real-time status screen immediately after payment, which shows the user a calm step-by-step confirmation, such as payment confirmed, locker reserved, locker assigned, and ready, so they feel confident and do not submit support requests. This also gives you a convenient space to handle delays without confusing the user.

https://live.chatbullet.com
https://vitcollc.ae

Thank you! Expand

Budget: 1200 USD Deadline: 22 days

Good day!

We have studied your project and have relevant experience.

I would estimate such a project at 55,000 UAH.

This includes:
- development of the structure;
- writing texts;
- design;
- layout;
- making corrections and fixing bugs;
- technical settings;
- consultations and training on working with the admin panel;
- domain and hosting.

Here are examples of work on WordPress:
https://www.bizlg.com
https://www.iholz.ch
https://www.ics-market.com.ua
https://solarenergo.ua
https://piwott.com

This is a package offer. If you cover any of the components on your side, please write in private for a discussion of the cost. Expand

Budget: 3200 USD Deadline: 14 days

Good day! 👋

I am interested in your project. I have experience in developing custom web platforms with booking, API integrations, and payment systems, so a similar architecture (booking engine + payment + hardware API) is clear to me.

Proposed stack

To ensure the system is stable and scalable:

Backend

Node.js (NestJS or Express)

PostgreSQL

Redis (queues / cache)

background jobs (BullMQ / queues)

REST API

Frontend

React + TypeScript

mobile-first UI

adaptation for QR scanning

Other components

Docker for deployment

webhook processing of payments

logging and monitoring

i18n for language support

Platform architecture

I plan to divide the system into main modules:

1️⃣ Booking Engine

booking logic

state machine for bookings

checking availability of lockers

managing duration and rates

2️⃣ Payment Integration

integration with Redsys / Getnet

server-side verification

webhook processing

retry logic for payments

3️⃣ Locker API Integration

automatic locker assignment

fallback scenarios

retry on errors

4️⃣ User System

email verification

booking history

My Booking page

5️⃣ Admin Panel

viewing bookings

payment control

user roles

logs

data export

6️⃣ Multi-location

scaling to multiple points

separate settings for lockers and rates

7️⃣ Multilanguage

Support:

English

Spanish

French

Italian

German

Portuguese

Experience

I have worked with systems that included:

booking logic

payment gateway integrations

REST API integrations with external services

React interfaces for mobile use

admin panels for data management

Work format

Git + Pull Requests

phased development (milestones)

staging for testing

regular demos of results.

I am ready to discuss the details of the locker API, rate logic, and architecture to clarify the final scope of work. Expand

Budget: 4500 USD Deadline: 32 days

Good day!
We are Coderfy, a company with experience in creating custom web platforms, booking systems, and integrations with external APIs and payment services.

We have practical experience in developing similar solutions, including:
— a mobile application for booking sports courts, where the user selects a time, makes a payment, and receives a booking confirmation
— custom platforms with payments, user accounts, calendars, and API integrations

Your project looks like a full-fledged custom booking platform with hardware API integration, so we can implement it with a scalable architecture to work with multiple locations.

We can implement:
• a backend booking system with a booking engine and state machine
• integration with Redsys Getnet (webhooks, server-side verification, error handling)
• integration with locker API (assign locker, retry, fallback scenarios)
• a mobile-first web interface with QR booking flow
• multilingual support
• an administrative panel for managing bookings, payments, and logs.

To provide an accurate budget estimate and timeline, we need to clarify a few points:
— the specification of the locker API
— the logic for assigning lockers
— details of the payment flow
— requirements for the admin panel
— the number of locations at the start.

After this, we will prepare:
• an estimated budget or price range
• implementation stages
• development timelines
• recommendations for architecture.

We would be happy to discuss the project details. Expand

Budget: 4000 USD Deadline: 40 days

Dear client, thank you for the opportunity to apply for the development of a mobile-first smart-locker booking platform via QR code. Below is my project proposal.

📌 Scope of Work

✅ Backend Development – development of a scalable backend system:
• booking engine and booking state machine
• user management
• multi-location architecture
• logging system
• background jobs and task queues.

✅ Payment Integration – integration of Redsys Getnet (Santander):
• server-side payment verification
• webhook processing
• error handling and payment cancellations.

✅ Locker API Integration – connection of the locker system:
• automatic locker assignment
• retry logic
• fallback scenarios
• API error handling.

✅ Frontend (Mobile-First Web App) – development of the user interface:
• QR booking flow
• selection of locker size (XS–XXL)
• selection of duration
• cost calculation
• My Booking page.

✅ Admin Panel – admin panel:
• booking management
• payment monitoring
• user roles
• log viewing
• data export.

✅ Multi-language Support – support for:
English, Spanish, French, Italian, German, Portuguese.

🚀 My Solution & Ability
🔹 Backend Development (Node.js / API Architecture) – experience in developing scalable backend systems.
🔹 Payment Gateway Integration – working with payment systems and webhook logic.
🔹 API & Hardware Integrations – integration of external APIs and devices.
🔹 Mobile-First Platforms – creating fast web applications for mobile users.
🔹 Scalable Architecture – designing systems for expansion to multiple locations.

⚡ Technology Stack
Backend: Node.js (NestJS / Express)
Database: PostgreSQL
Frontend: React / Next.js (mobile-first)
Queues: Redis / BullMQ
Infrastructure: Docker / Cloud deployment

🔚 Conclusion
I can implement the full development cycle of the smart-locker booking platform, including backend, frontend, payment integration, locker API, and admin panel, with architecture ready for scaling to new locations.

I would be happy to discuss the project details and long-term collaboration. 🚀

Sincerely, Expand

Budget: 4500 USD Deadline: 40 days

Hello!

My name is Oleksandr Shvets, I am a Senior Front-end Developer with over 10 years of experience in web and mobile applications, as well as experience in API integrations, payments, and building complex enterprise platforms. I have experience in the full development cycle: from architecture and frontend to integration with backend and third-party system APIs.

I have reviewed your technical assignment. The platform includes:

Main modules:
• Backend: booking engine, booking state machine, payment integration (Redsys Getnet), locker API integration, user management, multi-location architecture, action logging.
• Frontend: mobile-first web application for users – QR booking flow, size and duration selection, payment, “My Booking” page.
• Admin Panel: viewing bookings, payment monitoring, user roles, logs, data export.
• Language support: English, Spanish, French, Italian, German, Portuguese.

My approach:
• Frontend: React (Next.js / PWA), mobile-first UX.
• Backend: Node.js + PostgreSQL, background jobs/queues for bookings and integrations.
• API integrations: locker bookings, payments, retry/fallback logic.
• Testing and process automation for system reliability.

Deadline: 5–7 weeks (depending on the approval of the technical assignment and availability of the API for testing).

Budget: approximately $4,000–$6,000, depending on the final scope and integrations.

Examples of relevant work / portfolio:
• Pet projects and corporate web applications on React / TypeScript
• API and payment system integrations
• Portfolio: WriteBar

Technology stack:
• Frontend: React, TypeScript, Next.js, PWA
• Backend: Node.js, PostgreSQL, REST/GraphQL
• Integrations: payment gateways, hardware APIs, webhooks
• CI/CD, test automation, bug tracking

I am ready to discuss the details, implementation stages, and start working immediately after the technical assignment is agreed upon. Expand

Budget: 5000 USD Deadline: 35 days

Hello,

My name is Alexey, representing the NC-1 development team. With over 5 years of experience building custom ERP/CRM systems, mobile apps, and e-commerce solutions, we specialize in bridging the gap between software and hardware (IoT).

We have analyzed your requirements for the Smart-Locker platform and are ready to deliver a high-performance MVP focused on the "Scan-Pay-Unlock" core flow.

🛠 Proposed Tech Stack
To ensure speed, security, and scalability, we recommend:
Backend: Node.js (NestJS) + PostgreSQL (Robust logic for booking states).
Frontend: Mobile-First Web (React/Next.js) – Allows users to book instantly via QR without downloading an app (crucial for conversion).
Integrations: Redsys Getnet (Santander) + Locker API (Hardware communication).

👥 Project Team
A lean, efficient team dedicated to your MVP:
Project Manager: Requirement management and delivery control.
Backend Developer (Middle+): Booking engine, API logic, and payment webhooks.
Frontend Developer (Middle): Responsive UI and multilingual QR-flow.
QA Engineer: Testing payment security and hardware fallback scenarios.

📊 Investment & Timeline
Budget: $5,000 (Fixed price for MVP scope).

Timeline: 30–35 business days.

Our Portfolio & Cases: https://1drv.ms/b/c/b7a0d31a9dae1bc5/IQCpK38gmEvWT6F_Cso40Li-AXAKkSs-J67mCwll-C732pw?e=v4VVF5 Expand

Budget: 4900 USD Deadline: 35 days

Good morning,

I have familiarized myself with the project details — I see a well-thought-out architecture here and I understand that you are looking for a solid, scalable solution ready for implementation in multiple locations.

Project valuation: 18,000 – 24,000 PLN net, completion time: 7–8 weeks.

This type of project — with a booking engine, state machine, Redsys Getnet integration, locker API, admin panel, and multilingual support — is an area where I feel confident. I carry it out as a complete cycle: from backend architecture (Node.js + PostgreSQL), through mobile-first frontend, to implementation and testing.

You can find selected projects from similar implementations at soft-synergy.com/portfolio — I have experience with both payment integrations and backend systems with booking logic.

I would be happy to schedule a short online meeting — this is not just a conversation, but a full technical consultation directly with me, after which you will receive a detailed report and a binding offer. Such a meeting also allows us to ensure that we fully understand all requirements before starting.

Write to me — we will find a good time.

Antoni Seba
soft-synergy.com Expand

Budget: 1000 USD Deadline: 5 days

Good day. I am ready to complete this project as I have extensive experience in application development.

Budget: 4500 USD Deadline: 90 days

This project is a classic example of a system where the reliability of logic is more important than the beauty of the interface. The state of the transaction is critically important here: the payment went through, but the locker API did not respond? Or the locker opened, but the status in the database did not update?

My 15 years of experience in managing production processes helps me see such projects not as a "set of screens," but as a chain of business states (State Machine), where every failure must be handled.

My proposal for implementation:
1. Technology stack:

Backend: NestJS (Node.js) + TypeScript. This is the best choice for building a reliable Booking Engine and integrating external APIs (Redsys, Locker API).

Database: PostgreSQL. For transactional integrity of booking data.

Frontend: Next.js 16 (React 19). Mobile-first approach with instant loading via QR. Using server components minimizes the amount of JS on the user's phone.

Queues/Jobs: BullMQ (Redis). Vital for implementing Retry logic: if the Locker API is temporarily unavailable, the system will automatically retry assigning the cell.

2. Architectural solutions:

Booking State Machine: Implementation of clear transition logic: Pending -> Payment_Processing -> Locker_Assigning -> Confirmed. This eliminates "stuck" bookings.

Locker Integration: Creating an abstract layer for Hardware API. This will allow connecting lockers from other vendors in the future without rewriting the entire platform.

i18n: Full support for 6 languages through next-intl or similar, with automatic detection based on the browser's locale.

3. Project assessment:

Estimated budget: $4,500 (depends on the complexity of the Locker API and the volume of the admin panel).

Timeline: 7–8 weeks (full cycle from architecture to testing fallback scenarios).

My relevant work:
https://github.com/Melik1986
https://www.linkedin.com/in/melik-musinian
https://vercel.com/melik-musinian

I am ready for long-term cooperation and support of the system after launch. If you have documentation for the Locker API, I am ready to study it and provide a more accurate technical assessment.

Sincerely,

Melik Expand

Budget: 4907 USD Deadline: 30 days

Hello,

I have reviewed the assignment and this is a project that falls exactly within the area I work in daily — booking platforms, API integrations, payment systems, and admin panels.

I estimate the implementation of the entire platform to be around 18,000 - 24,000 PLN net, within a timeframe of 6-8 weeks. This is a fair rate for a project of this scale, considering the full scope: backend with a state machine, integration with Redsys Getnet, locker API, admin panel, and multilingual support.

I will use Node.js + PostgreSQL on the backend, with a mobile-first web interface. I work modularly — first the core booking and payment system, then the admin panel and hardware integration, which allows for testing and correcting each stage in real-time.

I have already completed similar projects — booking systems with payment integrations and state logic. You can see selected projects here: https://soft-synergy.com/portfolio

I would be happy to schedule a short online meeting — not only to discuss the details but so that you receive a specific report and a binding offer tailored to your needs afterward. This meeting has real value before you make any decision.

Jakub Czajka
https://soft-synergy.com Expand

Budget: 200 USD Deadline: 1 day

✋ Hello! We are the IT company dZENcode.

We are implementing a mobile-first web platform for booking smart lockers via QR code: Node.js NestJS, PostgreSQL, REST API, Redsys, locker API integration, admin panel, multilingual support, and multi-location, based on the team's experience, best practices, and our own developments.

Is there a specification for the locker API and the equipment vendor?
How is the QR code formed: location/cabinet code or dynamic link?

You can find detailed information about our services and rates on our website: Freelancehunt
Take a look – we will discuss the details of the work further, write when you are ready.

The final cost is determined only after clarifying the scope and requirements.

___________________
Sincerely,
Manager of dZENcode

Our strengths:
💎 10+ years providing IT services: Outsourcing, Outstaffing
🔥 90+ in-house specialists
🚀 Projects "from scratch" and for support
⚙️ SLA and post-production support
✅ Contract with the company, guaranteed results!
🔥 250+ public reviews since 2015. Expand

Budget: 4000 USD Deadline: 60 days

Good day. I am developing on angular/nest.js. I have experience with qr projects, the approximate price is indicated below. Do you have a ready design for evaluation? Examples of projects below. Payment via tracker. $12.5 per hour

https://mallorcab.com/en/home/
https://40ft.com.ua/

Budget: 1800 USD Deadline: 30 days

Hello.
According to the description, you have not just a mobile-first site, but a full-fledged booking platform with its own server logic: QR booking flow, booking state machine, payment flow, locker API, admin panel, and multi-location architecture.
We have relevant experience in developing systems with a similar architectural load. In particular, we created a Taxi Platform with client and driver contours, real-time logic, internal statuses, payment integration, and an administrative part. Therefore, we understand such products not at the interface level, but at the level of business logic, states, and integration contours.
In your project, the main complexity is not in the number of screens, but in assembling a stable system for booking, payment, locker assignment, webhook processing, retry/fallback scenarios, and a correct state machine without manual operations and failures in edge cases.
On our side, we can cover the backend, booking engine, state machine, integration with Redsys Getnet, locker API, error handling and retry logic, admin panel, multi-location foundation, and mobile-first user scenario.
GitHub Team:
https://github.com/Tehniki-Dev
GitHub:
https://github.com/vitalivo
We are ready to discuss the composition of the MVP and key integration points, after which a realistic work plan can be established by phases.

Budget: 1500 USD Deadline: 14 days

Hello, Snezhana!

Our IT company creates and improves websites that operate stably, quickly, and solve specific business tasks for clients. We are engaged in developing websites "from scratch" as well as enhancing existing solutions, increasing their performance and user experience for your users.

We have experience in:
- developing responsive and fast websites on various platforms (WordPress, OpenCart, Shopify, WIX);
- integrations with payment systems, CRM systems, external services, and internal systems;
- optimizing the performance and security of websites;
- setting up analytics and basic SEO tools;
- software development and automation of business processes: managing customer databases, resource accounting, automating repetitive tasks, integrations with third-party systems;

After completing the project, we provide 14 days of technical support, during which we help adapt the system to your final business processes and consult on any questions regarding the completed work. Thanks to the free support of the completed project, this allows you to be confident that the developed solution operates stably from the moment of launch and does not require any additional adjustments.

We work in a structured and responsible manner - focused on results that meet your business goals. Expand

Budget: 2500 USD Deadline: 30 days

Hello,
Your project is very interesting and technically well thought out. Building a mobile-first booking platform that integrates QR access, payments, and hardware APIs is exactly the kind of system I enjoy developing. I have experience designing scalable web platforms with complex booking logic, third-party integrations, and high reliability requirements.
For this platform, I would implement a robust backend using Node.js with a structured service architecture and PostgreSQL for reliable transactional data. The booking engine would include a clear state machine to handle booking creation, payment confirmation, locker assignment, expiration, and error recovery. Background jobs and queues would manage retries, webhook processing, and locker API interactions to ensure stability even when external systems fail.
The frontend would be a mobile-first web application designed for a smooth QR-based flow: scan → booking → payment → confirmation. I would focus on a fast and simple interface optimized for smartphones while still supporting desktop access for account management and the “My Booking” section. Multi-language support (EN, ES, FR, IT, DE, PT) would be implemented using a structured internationalization approach so the platform can easily scale to additional regions.
For payments, I would integrate Redsys with proper server-side verification, webhook handling, and error management, ensuring transactions are secure and resilient. The locker system would be integrated through a dedicated service layer with retry logic, fallback handling, and detailed logging for diagnostics.
I would also build a secure admin panel where administrators can monitor bookings, payments, logs, user roles, and export operational data. This panel would be designed for operational clarity, especially as the platform expands to multiple locker locations.
Estimated timeline: approximately 6–8 weeks, depending on API documentation availability and testing stages.
My stack typically includes Node.js, TypeScript, PostgreSQL, modern frontend frameworks, background queues, and containerized deployment. I can also share examples of similar backend systems and integrations from my portfolio or GitHub.
I’m very open to long-term collaboration after the initial release, including scaling the system, adding locations, improving analytics, and

Budget: 1200 USD Deadline: 14 days

Good day. Thank you for the detailed project description.

We can implement such a project as a team. According to our preliminary assessment:
development time — up to 1 week,
budget — starting from 1200 USD.

The final cost may be clarified after agreeing on all details regarding the API locker system, payment integration, and the structure of the admin panel, but we can initially focus on this budget and timeline.

We work with custom development, without WordPress, with the possibility of further scaling the platform.

We are also ready for further cooperation after the launch of the first version. Expand

Budget: 3300 USD Deadline: 14 days

Hello! 🚀

I have experience in developing custom booking platforms, backend systems with state machines, payment gateway integrations, admin panels, and API integrations with external services. For your project, I can implement the full cycle: a mobile-first web booking platform for smart lockers via QR, a multi-location architecture, logic for assigning lockers through API, integration with Redsys Getnet, webhook processing, retry/fallback scenarios, multilingual support, and a user-friendly admin panel for monitoring bookings, payments, and logs.

Technology stack used:

Backend: Python (Django/FastAPI), PostgreSQL, Redis, background jobs/queues

Integrations: Redsys Getnet, locker API, webhook processing, email verification, multi-language i18n

Frontend: React / Next.js, TypeScript, mobile-first web app

Infrastructure: Docker, VPS/cloud, CI/CD, logging, monitoring, scaling for multi-location

I am ready to discuss the project details in person and am ready to start working.

Best regards, Andriy Expand

Budget: 200 USD Deadline: 1 day

Good day
I am ready to collaborate). I have extensive experience in project management, including writing Technical Specifications (TS), prototyping, testing, selecting and working with designers and developers to achieve the results you need. I am confident that I can help you) The hourly rate, I would be happy to discuss in more detail with you)

Experience as a PM in website and mobile application development (plus advertising) for about 4 years in the office and now over 5 years remotely

I am in the TOP - 1 as a technical writer
In the TOP - 2 in project management
In the TOP - 7 in testing

I am ready to assist in client management, task setting for developers, testing, documentation writing, prototyping, and consulting not only on general issues but also on development stages.

Budget: 5000 USD Deadline: 50 days

We, along with a partner (designer + full-stack), have 4 years of experience in developing custom platforms and are ready to implement this solution "turnkey."

Our technology stack:
Backend: Node.js (NestJS) — ideally suited for booking state machine and queue processing (BullMQ/Redis), which is critical for retry logic when working with hardware.

Database: PostgreSQL (with full transaction support for payments and bookings).

Frontend: React (Next.js) with a Mobile-first approach. This will ensure instant interface operation after scanning the QR code.

Payments: Experience with Redsys / Getnet (Santander) — we will set up a server-side Webhook for instant payment confirmation.

Localization: We will use i18next to support all 6 languages with the ability to easily add new ones.

How we will implement this:
State Machine: We will develop a clear status logic (Pending -> Paid -> Assigned -> Active -> Completed) to avoid conflicts when assigning lockers.

Hardware API: We will implement a reliable layer for communication with lockers with a fallback system: if the locker API does not respond, the system will automatically reassign another cell or refund the money.

Admin panel: A full dashboard for monitoring the "health" of the system across locations.

Our conditions:
Experience: Our work with complex logic and APIs: hyperfi.tech, espressolab.com.ua, hudi.com.ua. Expand

Budget: 3000 USD Deadline: 30 days

Hello! I will complete your task quickly and efficiently.

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

Budget: 40 USD Deadline: 10 days

Good day
I am ready to start tomorrow. I have more than enough experience for this project. I will cover the entire development cycle. Write to me, we will discuss the details.
The cost of work is 40 dollars per hour, I think the maximum work will be 270 hours. How I work is in the reviews.

Budget: 5000 USD Deadline: 30 days

Hi!

I have experience developing booking systems, API integrations, payment gateways, and admin dashboards, including mobile-first applications and multi-language platforms. I can handle the full development cycle: backend architecture, QR booking flow, payment integration, locker API integration, and admin panel.

Stack: NestJS, PostgreSQL, React/Next.js, REST APIs, queues, Docker

I’d be happy to share portfolio examples and discuss the project details. Looking forward to potential long-term cooperation.

Best,
Jeo Vincent Carretas

Budget: 10000 USD Deadline: 40 days

Hello. I am a Golang developer with 4 years of commercial experience in Go development, including 1 year as a full-stack developer with GO + React (Mirasvit). I have experience integrating with payment tools such as Stripe. I have experience developing in fintech startups with a large number of integrations (SaveX, Granium). I have experience developing high-load systems. I work for results, providing a full development cycle including deployment and support of the development and testing environment (for production, it is better to have a separate DevOps). My main stack: Backend - Golang, Frontend - React/Vue, DB - Postgres. I have a good analytical background - 8 years as a business analyst/system analyst in top retail.

Budget: 7000 USD Deadline: 60 days

Hello, Snezana.
I am a Senior Fullstack developer.
I have been working with web development and API integrations for about 8 years.
I am also a Team Lead in a small team.
If necessary, I can involve another frontend developer.

Our website: https://digitalart.consulting

Timeline: 6-8 months
Budget - from $7000
For an accurate estimate - I would suggest having a call, after which I can give you a presentation about my vision for the product (functionality, architecture, etc.) and a precise estimate. Expand

Budget: 5000 USD Deadline: 42 days

Hello! FlipFactory is a team of full-stack developers specializing in Node.js + PostgreSQL + React/Next.js.

We have direct experience with a similar project:
FrontDeskPilot — a SaaS platform with a booking engine, online payment, admin panel (45 pages), multi-tenant architecture, JWT auth, i18n (6 languages). Stack: Node.js, PostgreSQL, React, TypeScript.

For your project, we offer:
• Backend: Node.js + PostgreSQL + Drizzle ORM, booking state machine, integration with Redsys Getnet, locker API with retry/fallback
• Frontend: React mobile-first PWA, QR booking flow, i18next (6 languages)
• Admin: booking monitoring panel, payments, roles, logs, export

Timeline: 6 weeks. Cost: $5,000.
GitHub: github.com/FlipFactory-it-com

We are ready to work through Safe. We can start immediately. Expand

Budget: 2000 USD Deadline: 30 days

Hello! I have a professional team ready to create this product for you. The client suggests using React/Next, and for the backend as you mentioned - NodeJS + PostgreSQL. I would like to see the design or references. Also, in the future, we can create native applications for Android/iOS. The price is approximate, let's communicate.

Budget: 1500 USD Deadline: 1 day

Hello!

I am interested in your project for developing a smart-locker booking platform via QR code. I have experience in developing backend systems using Node.js, working with API integrations, authorization systems, payments, and web application architecture.

I work with the following stack:

Backend

Node.js (Express / NestJS)

REST API

JWT / Auth systems

queues and background tasks

integration of external APIs

Frontend

React / Next.js

mobile-first interfaces

responsive layout

Databases

PostgreSQL

MongoDB

Infrastructure

Docker

VPS / Nginx

CI/CD

Vercel / cloud deployment

I have experience in developing systems that involve:

complex backend logic

integration of third-party services

working with external APIs

admin panels

processing asynchronous processes.

Your project looks like a classic booking platform with hardware API integration, and architecturally it can be implemented through:

Booking Engine

State Machine for booking statuses

Background Jobs for processing payments and locker API

Webhook handlers

Admin Panel for monitoring and managing the system

Estimated assessment:

Development time:
6–8 weeks

Estimated budget:
$6,000 – $12,000 (depending on the depth of API integration, admin panel, and final requirements).

I can implement:

backend architecture

API

payment integrations

locker API integration

admin panel

mobile-first interface.

I am ready to discuss the project details and solution architecture. Expand

Budget: 4000 USD Deadline: 28 days

Hello!

I am a senior Full-Stack developer with extensive experience in creating user booking platforms, integrating payment systems, and integrating hardware/API for both mobile web applications and large-scale backend systems. I have worked on numerous booking systems, including platforms for airline tickets, hotels, transfers (from point A to point B), and event tickets, integrating APIs from companies such as Amadeus, HotelBeds, Duffel, Suntransfers, and others. I also have experience implementing QR code-based access systems and integrating with smart devices, which aligns well with your smart storage locker booking platform.

Key modules I would implement:
• QR code booking process
• Booking mechanism + finite state machine
• Locker assignment service with retry/fallback logic
• Payment gateway integration
• User authentication and email confirmation
• Logging and monitoring of actions
• Admin panel
• Multilingual system

Estimated timeline:
4–5 weeks to create a complete MVP (according to your assessment).

Estimated budget:
4–5 thousand USD depending on the final scope of work, administration features, and complexity of the API for the lockers.

Work experience:
• Travel booking platforms (airline tickets / hotels / transfers)
• QR code-based access systems and integration with smart devices
• Payment systems (Stripe, Adyen, Redsys, PayPal)
• High-load booking and reservation systems
• API integration with third-party providers

Here is my previous project:
https://github.com/regginssa/eventup-app

I would be happy to discuss the API documentation for the lockers, booking logic, and payment flow to clarify the architecture and timelines. I look forward to detailed information about your project. Thank you. Expand

Budget: 2000 USD Deadline: 30 days

Good day, I am ready to complete it. Write to me in private to discuss the details further.

Budget: 12345 USD Deadline: 3 days

Hello! Are you planning to use ready-made services for QR management and communication with lockers, or develop your own gateway? We will discuss the details about timelines and budget in personal correspondence.

I will execute the project as follows:
1. I will develop a robust backend on Node.js with a booking engine, state machine, and integration of Redsys Getnet and locker API.
2. I will create a mobile-first web interface with multilingual support and an adaptive booking process.
3. I will implement an admin panel for managing locations, bookings, and system monitoring.

Thank you for considering my proposal. I will be happy to work on your project!