HR resource contacted me through linkedin and scheduled an interview which was generic, the goal was really to get me to do the code challenge. I did the challenge over the weekend and emailed it but after couple of days received a generic rejection letter without any information as to why they think I didn't meet their minimum requirements. I have asked the HR resource about the reviewer's feedback but HR resource didn't give any, just said it is their policy not to give any feedback, hence the negative review from me; I would have loved a feedback to learn from my mistakes and improve but it was a dead end.