I was contacted by a recruiter. Typical phone screen followed by a coding challenge. Coding challenge was pretty standard. You need to know how to write an API and specify endpoints. The main problem I had with this company was the lack of communication. I spent roughly 6-8 hours on this challenge. It worked. It met all criteria. It had full test coverage. I turned it in. Hear nothing for a full week and a half. I then receive a two sentence automated email saying they're not moving forward with the interview. Rejection happens. I get it. But WHY was the challenge not accepted? If someone is going to spend 6-8 hours of their own free time on a challenge you provided, the very least you can do is provide 2-4 sentences as to why it was not sufficient. Were the tests written bad? Were you looking for something else? Are there not enough endpoints? Who knows! And I'll never know since they treat potential employees like a number in a database.