Understand and implement hexagonal architecture. https://en.wikipedia.org/wiki/Hexagonal_architecture_(software) https://en.wikipedia.org/wiki/Hexagonal_archite

Understand and implement hexagonal architecture. https://en.wikipedia.org/wiki/Hexagonal_architecture_(software) https://en.wikipedia.org/wiki/Hexagonal_architecture_(softwa... If you build systems with these principles in mind, you can create systems that are extensible, without creating technical debt and YAGNIs.