A Facebook employee referred me for a position. Then I was first interviewed by a Facebook recruiter over the phone. Subsequently, I was interviewed over Skype by a Facebook employee who I think was in a role similar to what I was interviewing for. The recruiter made it sound like I was interviewing for a very general position, and I wouldn't know what kind of product or team I would be working on until after I was offered a position and had started working. The Facebook researcher who interviewed me made it sound like he was interviewing me for a particular team, potentially. It was unclear to me what role exactly I was interviewing for and what the job responsibilities were, which made it difficult to answer the interview questions.

Phone screen followed by virtual interview with hiring manager followed by full loop (several interviews on a single day). The recruiter was very helpful in targeting the right role. The hiring manager was quite rude and asked bad questions that could not really have helped assess qualifications for position.