I applied on Glassdoor, and a recruiter called me a day or two later and sent over a coding challenge. I took the challenge, and they said I did great. Then, I had a 45-minute phone interview. The interviewer had a hard time getting out his questions; I think he made them up on the spot. A couple of days later, I received a rejection email.

The 3-hour coding challenge was easy. I still don't know what the interviewer was trying to ask in the phone interview. They need to have a definitive question ready rather than making something up on the spot. If they didn't make it up on the spot, it surely seemed that way.