I was contacted by Facebook recruiter. The entire process was efficient and quick. After the initial phone call with the recruiter, I received an email with details about interview process and how to prepare for technical interview in general, which I think it was pretty nice. I was scheduled for the phone interview one week after. The phone interview includes behavior questions and online coding and it took about 45 minutes. It started with typical introduction and then I was asked to talk about one of the works/projects listed on my resume and why I would pick to talk about that particular one. The interviewer didn't seem to impress about the project I picked to talk about. There were a couple of behavior questions (i.e. conflict resolution etc). Then the longest part of the phone interview was a coding question. You can pick any language you'd like, which is a plus. The coding question was not difficult, but clearly not an easy one, requires some thoughts. Be prepared to provide test cases. I had it working but not covering many edge cases. At the end, you can ask the interviewer any question, which I did. It sounded like the interviewer didn't seem to be excited about the current work, but kind enough to give me details about the challenging parts and current interesting problems the interviewer has been working on. I heard back the interview result from the recruiter exactly one week after.