I would just build a simple web service using FastAPI and use React on the FE. FastAPI is a really nice framework for prototyping or even for building POCs. Whe

I would just build a simple web service using FastAPI and use React on the FE. FastAPI is a really nice framework for prototyping or even for building POCs. When the need arises to scale you don't have to to undo a lot of your work. Swagger first class support is a boon. Pydantic and all other database related support also comes at no cost. You already know about React so just go for it. DB - You won't go wrong with either MySQL or Postgres or you could save some setup time and go with one of the PaaS offerings from Google or AWS.