Call with HR.

HR also asked some technical questions.

I am disappointed with the interviewer. He did not know advanced thread-safe Java Collections and was very surprised seeing my newest IntelliJ Ultimate. I presented a nailed solution, but the interviewer (some Russian speaker, a bit hard to understand) was confused about it, appearing not to have a clue. He told me to use basic, non-thread-safe collections, remove Mockito (I used full TDD with JUnit 5), and then asked about a thread-safe solution. I explained that it was also based on C++.

There was no feedback on what was wrong. Negative feedback arrived almost immediately (I am wondering about their working hours).

Implement load balancer solution based on interviewer input.