One phone interview followed by one on-site.
Three rounds were conducted at the on-site interview, plus a reception period and a lunch interview. These were not evaluative.
Facebook has Ninja and Jedi interviews:
Signed NDA
The following metrics were computed from 359 interview experiences for the Meta Software Engineer role in Menlo Park, California.
Meta's interview process for their Software Engineer roles in Menlo Park, California is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for Meta's Software Engineer interview process in Menlo Park, California.