It could be a programmer. I think the origin comes from bro-y men around 2005 moving to silicon valley (eg zuck in that movie) but then having a very frat-culture vibe (eg. lots of booze, house parties but with programming, etc). It grew to be anyone silicon-valley and tech-adjacent that acted like this.
This is a known (to some) phrase, with a known (to some) meaning... its about bro-y silicon valley culture more than actual programmers