I applied through a recruiter. The process took 2 months.
Definitely need to pay attention to the STAR method. One tech interview really seemed to push me towards answers even after I said, "I'm not sure, I would just look that up", and eventually he got me to commit to an answer that I later realized was wrong. I was pretty disappointed because I felt it was unfair and was my Achilles heel. Such is life. I've heard that the best recourse is to try again next year :)
One simple question was directed toward mold design. I was asked essentially what was required to make an undercut in a plastic part.
The following metrics were computed from 1 interview experience for the Meta Product Development Engineer role in Sunnyvale, California.
Meta's interview process for their Product Development Engineer roles in Sunnyvale, California is extremely selective, failing the vast majority of engineers.
Candidates reported having mixed feelings for Meta's Product Development Engineer interview process in Sunnyvale, California.