Node.js Backend for Frontend

I already have the full frontend design in place and now need the server-side logic to bring it to life. The stack is set: Node.js for the backend and MongoDB for data persistence. I also need the app to communicate with several third-party services (think analytics, geolocation, or similar SDK-based providers), so clean, well-structured integration points are key.

Here’s what success looks like for me:
• A modular Node.js codebase (Express or a comparable lightweight framework is fine) that exposes well-documented REST endpoints matching the existing UI flows.
• Robust MongoDB schema/models created with Mongoose (or native driver if you prefer), including migrations or seed scripts for development data.
• Secure authentication and authorization middleware ready for JWT or similar token handling.
• At least one example implementation that calls an external third-party service and gracefully handles errors, retries, and timeouts.
• Clear README covering local setup, environment variables, and production deployment steps.
• Basic test coverage so future contributors can extend the project with confidence.

If this aligns with your experience and you can move quickly, let’s get started—I’m ready to hand over the frontend repo and endpoint spec immediately.