The Backend Fulcrum

The only viable pivot is a synchronized strike: refactor the REST API while migrating the database.

I decided to leave the aging React frontends alone for now. Instead, we would replace the legacy Java layer with a modern Python FastAPI backend, simultaneously translating the data layer into PostgreSQL.

Why FastAPI over Node.js? Because I was looking two steps ahead. Python's ecosystem offers a much smoother integration path for the AI-driven analytics and dashboarding I knew we would need in the future.

Crucially, the new FastAPI backend would be designed to flawlessly mimic the legacy endpoints. The external clients and internal middleware wouldn't even know the engine had been swapped.