Obviously a throwaway account, but I work at Facebook, on an infrastructure team. I average ~45 hours/week, except for the week I'm oncall, which is about every three months. I probably work 60 hours that week. I get in early (7:30am) and leave early (3 or 3:30), and sometimes I'll review diffs at night, but normally my laptop stays in my trunk when I'm at home.

I work hard when I'm at work, and really focus. I don't do a lot of the extra-curricular stuff that you can easily spend your time on. I'm an L6 and last year earned just north $450K with decent performance reviews. I have damn near a million dollars in unvested $FB RSUs, too, so there's almost no chance I'm going to leave for anywhere that won't match that with equally liquid public shares.

¯\_(ツ)_/¯