Full Stack Developer - Inventory Management System (Node/NestJS + React/Next.js + PostgreSQL + AWS)

We're building a centralized inventory management system and looking for a full stack developer to take it from spec to production. What the system needs to do: Track and manage stock levels across multiple locations/channels Handle orders and backorders Reporting and analytics dashboard User authentication with role-based permissions Integrations with third-party marketplace APIs (this is a core part of the work) Required stack: Backend: Node.js, NestJS Frontend: React, Next.js Database: PostgreSQL Infrastructure: AWS What we're looking for: Strong experience integrating third-party REST APIs, ideally marketplace or eCommerce platforms Solid database design skills — inventory data gets messy fast and we need it modeled right Experience building role-based auth systems Able to work independently, communicate clearly, and flag problems early To apply, please include: Examples of inventory, ERP, or eCommerce systems you've built Which third-party APIs you've integrated before Your availability (hours per week) and hourly rate A brief note on how you'd approach syncing inventory across multiple marketplaces without overselling Please start your reply with the word "STOCK" so I know you read the full post.