A VERY interesting thing about promotions at Meta: To get promoted above IC5 you need several IC6+ people to vouch for you. But levels are hidden and it’s frowned on to ask. So you try to assume who is IC6 or above. And sometimes the people you thought were IC6 are IC5…

I'm researching Meta's engineering culture in-depth. An interesting principle at Meta: compensation and career progression are separate. You can make more when not promoted, than those who are. (If you work/worked at FB/Meta and are interested in reviewing what I have, DM me).