Web-Based Inventory Management System

I need a robust web-based Inventory Management System with a minimalist user interface.

Key Features:
- Login/Sign Up
- Role Management (Admin, Supplier, Staff)
- Sales Channel Management (Online Store)
- Inventory Management (Component Management, Stock Level Management)
- Import/Export Functionality
- Sales Order Management
- Invoice Management
- Purchase Management (Container Builder)

Ideal Skills & Experience:
- Strong proficiency in React.js (front-end) and Node.js (back-end)
- Experience with MongoDB or other NoSQL databases
- Familiarity with Windows Server environment
- RESTful API development and integration skills
- Front-end development knowledge (HTML, CSS, JavaScript)
- Version control experience (e.g., Git)
- Proficiency in web development
- Experience with role-based access control
- Strong background in inventory management systems
- Ability to implement import/export functionalities

Please provide examples of similar work done and a timeline for completion.