Forget tangled logic. This guide shows how layered Go code stays clean, testable, and easy to change.
🏗️ Layers in action:
- Handler talks HTTP
- UseCase holds business rules
- Repos/Adapters abstract storage and APIs
- Middleware stays out of your logic
💡 What you get:
- Replace Postgres with a stub in 1 line
- Add new routes without breaking old ones
- Plan sensor maintenance, fetch weather, all cleanly separated
🧭 If you want scalable microservices that even juniors can navigate:
https://levelup.gitconnected.com/go-microservice-guide-2025-simple-layers-big-flexibility-d1c683408bd1
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