I applied online. About ten days later, I received an automated email with a link to a HackerRank problem. The role was not a typical trading or fintech programming position; it seemed more like a DevOps/testing/back-office position. Therefore, the HackerRank part of the interview was not the typical series of programming questions one gets on HackerRank. It was more like an investigative problem. This seemed good because the problem posed was actually relevant to the position. However, I never heard back from the company after submitting my solution.

Here are some issues with our trading system. Please write some Python code to figure out what's going on.