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Backend Engineering > A server from nothingThe same service, in Python
Phase 05A server from nothing238 of 434

The same service, in Python

Rebuild the identical endpoints with FastAPI. Different syntax, same request-response loop, and a type system that does more of the work.

Build50 minAI implements

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This one runs on your machine rather than in the browser workbench. Work to the outcomes below, then come back and mark it complete.

You should now be able to

  • Serve the same contract from a second runtime
  • Map Express concepts onto their FastAPI equivalents
  • Use type annotations to validate input at the boundary
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