I’m Michael. I was a principal engineer at Facebook from 2009 to 2017, where I was the top code contributor of all time and also conducted hundreds of interviews. I recently co-founded Formation.dev, an engineering fellowship that trains and refers engineers directly into big tech. Ask me Anything!

I didn't know him Facebook/Meta, I think we barely overlapped. In general for very senior engineers there are "archetypes" they follow and each one will have a completely different style of impact. I was a "coding machine" because I cranked out a ton of code. Some of the more industry-expert type engineers were more hands off on code. So while I can't speak about Eric, it's possible he's wasn't a prominent "coder" but was a senior and impactful engineer none the less, or it's possible he was a prominent coder! don't know!