What do you prefer to test more — backend or frontend? Why?

The choice between testing the backend and frontend depends on personal preferences and the specifics of the project.

Backend testing usually involves checking business logic, APIs, databases, and integrations. This allows for a deeper understanding of the internal processes of the system, verifying data processing accuracy, and robustness against errors.

Frontend testing focuses on the user interface, user interaction, and visual display. It is important to verify usability, responsiveness, and the correctness of element rendering.

Personally, I prefer testing the backend because it allows working with application logic, creating automated API tests, and ensuring system reliability at the data and services level. However, frontend testing is also interesting, especially when aiming to provide excellent UX and cross-browser compatibility.