Could you share examples of mistakes or problems that arose in your last project?

The following issues arose in the last project:

• Incorrect exception handling: sometimes errors were not logged or handled correctly, which complicated debugging.
• Performance problems: due to inefficient database queries, the application ran slowly with large data volumes.
• Team conflicts: insufficient communication led to duplicated work and conflicts in the code.
• Lack of tests: due to inadequate test coverage, some bugs made it to production.

For example, once, due to the absence of a null check in a method, a NullPointerException occurred, leading to service failure. After adding checks and unit tests, the situation improved.