*I still haven't accepted the offer; Glassdoor automatically adds "Yes, and I accepted" when you say you've received and offer :-)*
Facebook interview starts with a recruiter phone screen, two phone interviews with designers, and then a full onsite interview.
I was interviewing with another company when Facebook reached out to me so I didn't have to go through the phone interviews. I was flown in for the full interview, which was a fun experience! My interviewers were friendly, humble, and genuinely interested in talking to me.
The day started off with a 30 min panel presentation of my portfolio work. It's really challenging to consolidate your work in such a short presentation. I was only able to get through 1 major project.
1 on 1: Product Critique - a popular mobile app
1 on 1: Product Thinking exercise - whiteboarding a solution to a design problem - this is actually a lot of fun! I think the goal is to understand how you approach designing something rather than coming up with a novel solution. I didn't have a fully designed wireframe or anything, but I did have a scenario of what the full experience might be.
1 on 1: Chat with a Design Manager.