Can you tell about the architecture of the system you implemented in your last project?

In my last project, I implemented an architecture based on a modular approach with separation of concerns. The system was built on a client-server principle:

• The client side was responsible for user interaction and sending requests.
• The server side processed requests, performed business logic, and interacted with the database.

To ensure testability and ease of maintenance, an abstraction layer for data access was used, along with separate modules for different functional blocks. In QA automation, a structure with test scenarios divided by functionality was applied, which allowed for quick identification and correction of errors.