Have there been any failures/problems at work?

Yes, during the work process, there were situations that can be called failures, and they became valuable experiences. For example, once in a Go project, I mishandled an error when working with the database, which led to data loss during a transaction failure. After that, I implemented more strict error handling and added automated tests to verify the correctness of transaction rollbacks.

Another case involved incorrect use of goroutines, which caused memory leaks and deadlocks. This taught me to pay more attention to synchronization and to use contexts for canceling operations.

Such situations help improve code quality and development processes.