On campus interview following on-campus career fair then offered on-site interview in Austin, TX offices. On-site consisted of 4 coding interviews with various questions ranging from string comprehension to bit-wise manipulation. At end of interview day, mentioned to interviewer that I had another offer which I had to respond to by Friday of that week and was told that I would be informed of my decision by then. On that Friday, I had still not received any response and called the offices to speak to recruiter. Recruiter was not available to speak and also did not receive any word for multiple weeks. Seemed very unprofessional to me to not respond in a timely manner when I was told I would hear back. Another friend who had interviewed with me had a similar experience but he was at least told he did not get an offer whereas I received no response.