Developer Compares Go and FastAPI After Building Real Projects With Both

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A backend developer who built multiple Go projects, including a logistics platform and a fraud detection system, switched to Python's FastAPI while building a new project called LinkUp. The developer found FastAPI required significantly less boilerplate code, with features like automatic request parsing, Pydantic validation, and OpenAPI generation handled by the framework through Python type annotations. Dependency injection in FastAPI initially felt unfamiliar compared to Go's explicit constructor-based wiring, but the developer came to understand it as a declarative approach to the same underlying dependency graph. A key learning was that using async functions in Python does not automatically make all operations non-blocking, unlike Go's goroutine model which abstracts concurrency more transparently at the runtime level. Overall, the developer concluded that FastAPI's reduced visible complexity reflects shifted conventions rather than absent functionality.

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