ERP (Enterprise Resource Planning) system programming with Claude code

Hello! I am a co-owner of a manufacturing brand, so it will be easy for us to communicate: I understand the logic of business processes (planning, cost, inventory) not only as a programmer but also as an entrepreneur. If you are interested, here is my project that I implemented in vanilla. Example of my code (Vanilla JS + Node + WebSocket): https://github.com/ArtemkaZabolotniy/web_messenger I work modularly with JS without writing huge monoliths, optimizing code using WebSockets (for less load on the system) and constantly working with Node.JS.

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Hello. I can help turn your prototype into a full-fledged ERP system: analyze and structure the current Vanilla JS code, design the database, develop the backend/API, authorization, roles, and secure data storage.

I have experience in Full-Stack development, working with SQL, and designing application architecture. I can also analyze and tidy up code created with AI to make it maintainable and ready for real use.

I am ready to first review the current code and then propose the optimal architecture and implementation plan.

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Good day.

It will be much faster and cheaper to use the powerful CRM/ERP system we have already developed with modules for Production + Warehouse + Accounting, etc.:
https://freelancehunt.com/showcase/work/razrabotka-erp-dlya-proizvodstva-sklad/2026079.html

A separate powerful production section:
https://freelancehunt.com/showcase/work/crm-erp-modul-virobnitstvo/2037651.html

We can discuss in more detail and show what we have and how it works.

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Hello!

My name is Artem, I am a Full-Stack developer with experience in creating scalable SaaS platforms and automation systems. Your task of transforming a Vanilla JS prototype into a full-fledged ERP system is completely clear to me: I know how to work with AI-generated code and understand how to structure it into a reliable modular architecture.

Why I can handle this task:

Modular Frontend without frameworks: I am proficient in Vanilla JS (ES6+) and modern CSS. I will break your "single-file" code into clean, maintainable modules, preserving the simplicity and performance you value.

Experience in Backend development and databases: My main stack is Node.js and PostgreSQL (Supabase). I will design a relational database for accurate tracking of production stages, materials, and finances, ensuring data integrity and security.
…
Security and roles: I will implement a robust authentication and role-based access control (RBAC) system to protect financial and production data from unauthorized access.

Working with business logic: In my project GlobalFit, I have already implemented complex user management systems, billing, and payment integration. In the Quant Traders project, I created real-time systems with deep data analytics.

How I see the work process:

Audit and refactoring: Analyzing the current Drag & Drop logic and calculation modules, transferring them into a modular structure.

Database design: Creating a schema for orders, employees, costs, and schedules.

API layer: Developing secure endpoints for frontend-backend communication.

Final implementation: Setting up access rights and deploying the system on secure hosting.

Estimated timeline: 20–30 days to create a stable MVP.
Budget: I am ready to discuss after reviewing the current code volume.

I value performance and minimalism in code just as much as you do. I would be happy to discuss the details of your project and conduct a technical audit of the system. This is a serious project, and your experience with GlobalFit and Quant Traders gives you excellent arguments. The client is afraid of "bloated" frameworks and wants to maintain the speed of Vanilla.

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Good day, Mareks!
I can help you transform the existing AI-generated Vanilla JS frontend prototype of the ERP into a fully secure Full-Stack system with a backend, database, and user roles.

What I will do:
- Audit and refactor the current single-file JS into a modular architecture
- Develop backend API (Node.js or Python - depending on the task)
- Design and integrate PostgreSQL / MySQL
- Implement authorization, roles, and basic security
- Integrate business logic (planning, finance, calculations, data storage)
… - Connect the frontend with the backend API without losing the performance of Vanilla JS

The focus is not to rewrite the system, but to make it a stable, scalable ERP product.

We can have a brief call for 10-15 minutes, I will quickly assess the current code and provide a real plan for stabilizing the system.

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Good day. I understood the task of developing the backend for your ERP system and have relevant experience. I propose to implement the server part using Nestjs and Postgres. I am ready to discuss the details and start working, I would be happy to collaborate.

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Mareks, greetings!
Straight to the point: we have strong expertise in complex fintech projects - including solutions for banks and credit systems (calculations, transactions, security, working with sensitive data). And already based on this, experience in developing custom ERP and CRM systems.
Your case is right at the intersection: complex logic + finance + need for reliable architecture.
To avoid "shooting in the dark" regarding timelines and budget, it is critical to start with an audit.
Right now you have a prototype, and without reviewing the code, it is impossible to accurately assess the volume and risks.
Here’s how we propose to proceed:
Short preliminary review
→ we provide an approximate estimate for the audit volume
Full audit (first stage, paid)
… → analysis of code structure (including AI parts)
→ assessment of architecture and bottlenecks
→ recommendations for backend, database, and security
→ clear plan for improvements
Based on the audit results
→ we form the final cost and development timelines

We are ready to look at the current implementation and provide initial understanding of the volume 👍

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Hello!
I am ready to decompose the finished frontend. Experience in React/Vue/Inertia/Laravel/PHP 5+ years.
I propose to implement the backend on Laravel — this will allow us to quickly and safely turn your current prototype into a full-fledged ERP system. Laravel provides ready-made tools for authentication, roles, data protection, and working with the database (Eloquent), which significantly speeds up development and reduces risks. It is also convenient to build a REST API and neatly integrate your current logic on Vanilla JS without losing performance. The framework is excellent for complex business logic (calculations, planning, finance) and easily scales as the system grows. I am ready to conduct an audit of the current code and propose an architecture for your project.
I am ready to discuss prices and deadlines after reviewing the finished layout.
I would be happy to collaborate!

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Hello,

I work as a backend-oriented developer (PHP / Laravel / Yii2) and can cover key parts of the project:

- design and implement the backend (API, business logic)
- build a secure database architecture (MySQL/PostgreSQL)
- implement authentication, roles, and access
- integrate the existing Front-end with the server side
- structure data and calculations (expenses, time, revenue)
…
I can also help with structuring existing code and preparing for scaling.

I can support Front-end (Vanilla JS) at the level of integration and refinement, but the main focus is on the backend and system architecture.

I am ready to discuss the details and look at the current code.

Estimated approach:
first an audit and decomposition of the system → then phased implementation of the backend and integration.

Estimated timelines: 2–6 weeks (depending on the volume and complexity).
Rate: $15–25/hour (we can agree after assessing the tasks).

I am ready to start immediately.

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Hello,
I have reviewed your ERP prototype and understand the task - to transform the complex front-end generated by AI into a secure and scalable full-stack system.
I can help:
Refactor and structure the existing code
Design and develop the backend (FastAPI/Python)
Create a well-thought-out relational database (PostgreSQL)
Implement secure authentication, roles, and data protection
Connect the frontend to the backend through a clean and efficient API
I have experience in developing API systems and integrating with AI. I focus on clean architecture and long-term project support.
… I suggest starting with a short audit of the current system to determine the optimal architecture and work plan.

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Hello!
I have carefully studied the description of your project and am ready to act as a Full-Stack developer to complete and fully implement your internal ERP system.
What I offer:
Conduct an audit and quality refactoring of the existing Vanilla JS code (one large file → clean modular architecture) without loss of performance.
Develop a reliable and secure Backend with a convenient REST/GraphQL API.
Design and implement a database (PostgreSQL preferred) with the correct structure, indexes, and security.
Fully integrate the existing frontend with the backend: saving schedules, Drag & Drop, financial calculations, materials, and working time.
Implement a secure authentication, authorization, and role distribution system.

… My stack and approach:
Frontend: Vanilla JavaScript (ES6+), modular architecture, maintaining high speed and lightness.
Backend: Node.js + Express (or NestJS) — the most logical choice in your case, but I am ready to discuss Python (FastAPI/Django) or PHP.
Database: PostgreSQL
I will pay special attention to security (protection against OWASP Top 10, secure password storage, JWT/Session, API protection, etc.).

I have extensive experience in translating "raw" and AI-generated projects into clean, scalable, and secure architecture, as well as experience in developing accounting and planning systems for production.
I am ready to start with an audit of the current frontend code and prepare a detailed work plan and architecture.
I would be happy to discuss the project details:

Scope and deadlines
Current size of the frontend code
Number of system users
Special business requirements

Please let me know a convenient time for you for a call or to continue the correspondence.
Best regards,

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Hello!

Yes, I am ready to take on this project. I have experience with both Vanilla JS and backend (Node.js/Python), databases, and building ERP systems.

What I will do:

Audit and structure the Front-end — I will divide the code into modules (without frameworks, pure JS), preserving all logic (Drag&Drop, filters, modals, API AI).

Backend — you choose: Node.js (Express) or Python (FastAPI). I will develop a REST API for secure data transmission.
…
Database — I will design PostgreSQL (production, finance, graphics, users). All data is protected.

Integration of business logic — time planning, calculation of income/expenses (materials + working hours) — storage and processing on the backend.

Security — JWT authentication, roles (admin/manager/user), protection against SQL injections, XSS, CSRF.

What you will get: a fully functional ERP system with a modular architecture, ready for implementation.

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Hello!
We can start right now.
I have already developed a system for production.
I have been working with js, php, node.js technologies for a long time.
Feel free to contact me, I will be happy to collaborate with you!

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Hello.

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

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Good day, we have reviewed your ERP project – we have 4 years of experience in IT and work as a duo, which guarantees speed and a comprehensive approach – we can structure your Vanilla JS code into a modular system without losing performance, develop the Backend on Node.js with REST API, design a PostgreSQL database, and integrate financial and production logic with secure authorization and roles – we have relevant experience in similar solutions.

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Hello!

You already have a strong foundation for the project — but in its current form (one file), it is more of a prototype, and without the right architecture, it will become unstable and difficult to maintain. I specialize in such tasks — turning "works" into a "reliable system."

What I will do:
- Carefully break down your Front-end into a modular structure (without losing the speed of Vanilla JS)
- Develop the Backend (Node.js) with a clean API
- Design a secure Database (PostgreSQL) for your processes
- Connect all business logic: planning, finance, calculations
… - Implement authorization, roles, and data protection

I have experience working with complex logic, optimization, and systems where stability and accuracy are important.

I approach such projects as a long-term system, not "do it and forget it."

I am ready to review the current code and propose a clear step-by-step plan.

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Hello, Mareks!

I am ready to take on the project. I have suitable experience in all key tasks: modularization of Vanilla JS without loss of performance, Backend development (Node.js/Python) and API, designing PostgreSQL/MySQL, authentication, and role distribution. I also have experience with AI-generated code — I understand how to audit and structure it.

To prepare a specific proposal, I need to see the current Front-end and discuss the MVP priorities, number of users, and infrastructure.

I am ready to call at a convenient time.

Best regards,
… Arthur Babara

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Hello
I have experience in developing enterprise ERP systems (I can show my CV)
I can work on refactoring the front end and creating the back end for all the logic
Question: do you currently not have a database?

Write to me, we will discuss the details

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Hello. I have been working with JavaScript/Node.js for over 9+ years. I am ready to help with both frontend and backend. Feel free to contact me.

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Hello!

I have experience in full-stack development, including the creation of ERP systems and internal business tools. From your description, it’s clear that the main task is to transform the existing front-end prototype into a fully-fledged, secure, and scalable system—and that’s exactly my area of expertise.

I work with Vanilla JS and PHP, and I will most likely use Laravel to build the backend and API. I can refactor the existing code, implement server-side logic, design the database, and correctly integrate business processes, including finance and planning. I also have experience integrating AI solutions, specifically ChatGPT and Gemini.

Work format: $15/hour or a fixed fee after reviewing the detailed requirements and the current solution. If possible, please send access to the code or a demo for evaluation.

Good day!

I am an experienced Full-Stack developer, ready to complete your ERP system. I have deep knowledge of Vanilla JS, SQL (PostgreSQL/MySQL), and experience in building secure Backend architecture. I will effectively structure the existing code, integrate all business logic, and the security system.

Message me privately, and we will clarify the details.

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Good day
My name is Dmytro, representing King Kong Lab
I understand your project well — you already have a strong front-end prototype, and the task now is not to "write from scratch," but to properly transform it into a full-fledged, secure ERP system
What I will do
1. Audit and structure
I will analyze the existing code (one-file)
I will break it down into modules without losing the speed of Vanilla JS
I will preserve all logic (drag&drop, filters, UI)
2. Backend + API
… I will implement the server (Node.js / Python — we will choose optimally)
I will build an API for data handling
I will create a clean and scalable architecture
3. Database
I will design the structure (PostgreSQL / MySQL)
Storage: production, finance, planning
Optimization for speed and load
4. Logic integration
I will connect the front end with the database
Storage of tasks, schedules, calculations
Accounting for expenses/income
5. Security
Authorization (login system)
User roles
Protection of API and data
Approach
Not just "attach the backend," but build a stable system that can be developed
Especially important if the code is partially generated by AI — to structure it correctly
Experience
Working with custom systems, CRM/ERP logic
Vanilla JS + backend architecture
Working with financial and operational data
I am ready to look at the code and propose a clear implementation plan
I would be happy to collaborate

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Hello! I have reviewed your assignment and believe that I can successfully complete it. I would be happy to collaborate, please write to me personally for further details.

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Hello.
I am ready to take on the improvement of your ERP system as a Python / Full-Stack developer.
From the description, I see the task is not just to "write the backend," but to properly transform the current Front-end prototype on Vanilla JS into a secure working application with a proper architecture, database, user roles, and the preservation of production/financial data.
What I can do:
Conduct an audit of the current HTML/CSS/Vanilla JS code
Separate the "one file" into a clear modular structure without switching to React/Vue
Design the backend in Python, for example, FastAPI or Django
Create an API for working with orders, production processes, schedules, calculations, and finances
Design a PostgreSQL database
… Implement authorization, user roles, and basic data protection
Connect the existing frontend to the backend via API
Prepare the project for secure deployment on the server

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For your proposed architecture, the following are my recommendations, on how I'd build this.
Frontend — I'll restructure the existing single-file HTML/CSS/JS into a clean modular file structure. Each logical section (invoices, projects, suppliers, scheduling, financials) becomes its own JS module. No frameworks introduced — pure ES6 modules, maintaining your current performance and keeping the codebase easy for your team to maintain.
Backend — I'll build the server layer in PHP with a clean REST API architecture. PHP is battle-tested for exactly this type of internal business system, runs on virtually any hosting environment, and requires no additional runtime setup. All your frontend fetch() calls will point to secure API endpoints.
Database — PostgreSQL for the relational data layer. Tables designed around your core entities: projects, invoices, suppliers, materials, work schedules, users, and financial transactions. Proper foreign keys, indexes, and normalized structure from day one.
Authentication & Roles — Secure session-based login with bcrypt password hashing and CSRF protection. Role system with at minimum three levels: Administrator, Manager, and Viewer — each with clearly defined permissions mapped to your existing modules.
Before we begin, I'd like you to clarify some questions for me:

Do you have existing hosting or a server where this will be deployed?
How many users will the system have and how many roles are needed?
… Is the OCR invoice upload feature (visible in the screenshot — "Ielieciet PDF rēķinu šeit") already connected to an API or is that also part of the scope?

The answers will help me give you a precise fixed price.

Good day, I have extensive experience in developing such ERP systems, I can show examples. Let's discuss in more detail, and also let me know if you will need technical support after the work is completed?

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