Node.js Developer Needed for REST API, PostgreSQL & JWT Authentication

I am building a small SaaS-style internal tool and need a backend developer to create the first version of the API. The frontend is handled separately. This project is focused on Node.js backend development, PostgreSQL database design, authentication, and clean REST APIs. ## Scope * Set up a Node.js backend using Express * Design a PostgreSQL database schema * Create user registration and login endpoints * Implement JWT authentication * Add Admin and User roles with role-based access control * Build CRUD APIs for inventory items or projects * Add validation and error handling * Provide API documentation using Swagger or a Postman collection * Add a README with local setup instructions ## Deliverables 1. Working backend source code 2. PostgreSQL schema and setup instructions 3. Authentication and user-role system 4. CRUD API endpoints 5. Swagger documentation or Postman collection 6. README file for running the project locally ## Budget and Timeline Fixed-price budget: $120 Timeline: 3–5 days Please include a short example of a similar Node.js API, SaaS backend, or dashboard project you have built. Also explain how you would structure the backend and handle authentication and user roles.