In the day-to-day life of a developer, writing code that works is not enough.
Over time, I understood that the real challenge is to keep that code understandable, scalable and clean.
In this article I share principles, examples and learnings that have served me well working with NestJS on real projects.

🟩 Development (3 key sections)

1️⃣ Clean Code principles that I apply in NestJS

  • Avoid unnecessary comments: the code explains itself.
  • Divide responsibilities: each class does only one thing.
  • Descriptive names for classes, functions and variables.

2️⃣ Modular and reusable architecture

  • Use modules to separate domains.
  • Inject dependencies instead of coupling them.
  • Avoid business logic in controllers.

3️⃣ Testing: why it saved me more than once

  • Using unit testing and e2e.
  • How it helped me to detect bugs before deployment.
  • Tools I use: Jest, Supertest, Stryker (mutation).

🟨 Conclusion

Writing clean code is not something that is achieved with a single practice, but with consistency.
NestJS has helped me structure my projects better, but more importantly, applying good practices has made my projects scale without becoming a nightmare.

What principles do you apply in your code? I'll read you in the comments 🚀