Similar to some others, I first got a LinkedIn message from a Facebook HR staff based in India. We scheduled the first phone interview, which is a simple quiz with 5 multiple choice questions, conducted by the HR staff. Afterwards, I had the 2nd and 3rd interview with Facebook iOS engineers, different people but the format is pretty much the same. Each is about 45 min to 1 hour, asked me to do live coding on coderpad.io. I progressed and Facebook flied me from Sydney to Silicon Valley for a face to face interview. It's from 10am-3pm. Touched on many areas including behavioural questions, iOS app architecture, write code on whiteboard, time and space complexity, etc. I did not get an offer in the end but very impressed by the process.

Pretty standard interview process for FAANG/MANGA companies. Initial call with a recruiter, preliminary coding interview, on-site that spanned two days (because I asked) and a follow-up interview. The on-site interview consisted of 3 coding interviews, 1 behavioral, and 1 system design interview.