HR called and confirmed interview. Then two rounds of interviews. One by a senior QA Engineer and other by principal engineer and hiring manager. The process was smooth and quick. However, one of the interviewer in second round was rude.

Had initial phone interview with hiring manager. He had a "take home" project sent to me, which I completed and sent back. Had multiple followup phone interviews with the hiring manager, several of his team engineers, and other engineers/managers at Fireye (8 separate interviews). Hiring manager pretty much indicated to me at this point that I had the job. Got a request to drop everything and fly out to Reston for a face to face since the manager would be there at their facility (his whole team works remotely from their homes). Was told it was just to meet the manager. Got there and was put through another 5 interviews. Manager then took me out to lunch, at which point, when asked about time frame for a decision, he told me to keep my phone on that night, but that he was satisfied with everything, and proceeded to tell me about my first month and what I would be doing. This was a Wednesday afternoon. Heard nothing Wed, Thurs, Fri, Sat or Sun. Woke up Monday morning to a form "We are choosing not to pursue your candidacy at this time" email.