Fullscript Ruby On Rails Developer interview questions

After I sent my resume it took 1 week to receive an answer to schedule the first interview. I was interviewed by the Engineering Manager to talk about my background After that I received a code challenge to solve in 8 hours. It took almost 3 weeks to get an answer back where another two interviews were scheduled. At the end I received a generic rejection email. I asked for some feedback but I never received an answer.