MongoDB Backend with Auth & APIs

I already have the entire frontend built and tested; what I still need is the backend that will let the application actually store data, protect user accounts, and communicate smoothly with the UI.

Here is what I expect from this engagement:

• Wire the app to a MongoDB database, creating the necessary collections and indexes so data reads and writes stay fast.
• Implement secure user authentication (sign-up, login, session/token handling, protected routes).
• Develop well-structured API endpoints that my frontend can consume without changes; clear, consistent JSON responses are essential.

I don’t mind which framework or language you use as long as it plays nicely with MongoDB and can be deployed easily to a standard cloud environment. Clean, commented code in a Git repository and clear environment variable naming will be the sign-off criteria.