What did you have more of in testing all this time: UX/UI, backend, API integrations?

In my testing experience, the most involved areas were backend and API integrations.

Backend testing includes checking business logic, database operations, performance, and security. API integrations involve verifying interactions between services, correctness of data exchange, and error handling.

UX/UI testing was less frequent, usually in the form of testing user scenarios and visual elements, but the main focus was on the server side and integrations.

This experience allows for a deeper understanding of how the system is structured from within and how different components interact with each other.