Joining one of the FANGs as your first job is a great way to kill your chances of developing a highly diverse skill set early on. Good luck doing anything interesting when there are 120 superior engineers who are bored out of their minds all vying for the opportunity. Working in a smaller company that has real problems to solve tends to be much more rewarding. There's a reason the technical leadership at the big 4 tends to be comprised of engineers who came from elsewhere.