How do you ensure your team writes testable, maintainable code?

We design for testability from day one. For example, we follow dependency injection in

.NET Core and avoid tightly coupled code. In React, we separate logic into custom hooks or

services, making it easier to unit test.

We aim for meaningful unit tests (xUnit, Jest) and integration tests where needed. I also

encourage writing clear interfaces and modular components so code can evolve without

breaking everything. Maintainability is part of every code review discussion.