I was asked several times to attend an evening event hosted by FB. I was told that attending these events are almost considered first interview/screens. I finally attended one on May 31 in SF. It was great. I spoke for a long while to a FB R4R person. He told me he wanted to chat soon in the future. After 3 messages from me following up to see if we could set up a time, I received NO response from him. This reflects really poorly on FB and this person. I will never consider working at FB ever again. This experience left a really bad taste in my mouth.

First round recruiter screen, talked about scope of work and experience. Second round was panel style assessing technical and behavioral questions. Each interview was around 45 minutes each. Took about a little over a week for an offer.