Unfortunately, the code was in a desolate state and without unit tests, and the time to complete the task was extremely tight (15 minutes). Also, the task was not clear, the code was uncommented and it was not easy to guess what were simplifications for the test and what were real errors. I did not manage to get the code running in my IDE in time as there was no build system and the code depended on 2 external libraries. I therefore proposed to restructure all the code using a subscribe pattern. This was not the desired response. I looked at the code once more after the interview. I'm now convinced that it has elementary concurrency problems. In my opinion, my interview partners are not aware of this fact.
