I applied online. The process took 3 weeks. I interviewed at Meta (Austin, TX) in Oct 2020
Interview
1 behavioral interview with classic questions that you would expect in any behavioral interview and 2 45-minute interviews all technical in nature. They got progressively harder from leetcode easy/medium to medium/hard.
Overall great. Besides the basic "why do you want to work here"-type questions, they were only really interested in your ability to solve the algorithmic problems. I think the internship is treated as the real "interview" for the job (both for the intern and FB, I guess), so the internship interview was simple.
Everyone was nice and professional. Things did move a little slow, though.
I applied through an employee referral. I interviewed at Meta in Mar 2019
Interview
Interviewer was curt, cold, and seemed to write me off from the get home without engaging with me or my thought process. He seemed generally disinterested in being there or interviewing me.