I applied through their website. One week later, a recruiter emailed me about another position, which was incorrect. I agreed to do the interview, even though it wasn't interesting to me. So, I emailed the recruiter back to explain this. He then scheduled an interview for the right position.

It was a phone interview lasting about 45 minutes. The hiring manager asked me about my background and then posed a question about OpenGL implementation. He seemed to like my answer, but they ultimately stated I wasn't a good fit for the position, which I strongly disagree with. I'm unsure if this was the actual reason or not.

It was a specific OpenGL implementation under X Window System, which I don't recall.