MERN Marketplace Module Expansion

I already have a MERN-based, microservices-oriented multi-vendor marketplace running with an admin panel to manage sellers. I now need a developer who can extend this platform by adding several production-ready modules and polishing the existing codebase.

Core scope
1. Logistics module
• Shipment tracking tied to each order’s status.
• Inventory management that syncs stock levels across sellers in real time.
• Carrier integration so merchants can generate labels and see live rates from major shippers.

2. Coupon module
• Percentage discounts, fixed-amount discounts, and buy-one-get-one-free logic.
• Validation rules for date ranges, usage limits, and seller-specific offers.

3. Marketplace subcategories
• Electronics, Clothing, and Home & Garden nodes added under the current category tree, including CRUD in the admin UI and SEO-friendly slugs on the storefront.

Tech context
• Front end: React + Redux Toolkit.
• Back end: Node.js, Express, MongoDB, Dockerized microservices, RabbitMQ for events.
• Git for version control; all work will go through pull requests and code review.

What I provide
• Source repo access, database schema, and API documentation.
• Postman collection for existing endpoints.
• UI wireframes for the new screens.

What I expect
• Clean, well-commented code that follows existing style guides.
• Modular services that can be scaled independently.
• Unit tests for critical functions and a brief README explaining setup and deployment steps.

If you have shipped similar marketplaces or logistics integrations, I’d love to see live links or repo samples. Let’s bring these features to production together.