So the lovely people that hired him and went through that rigorous selection process are they being canned too? They too must be incompetent. Given a big part of Snapchat is trust - and they are clearly not trustworthy - it might be time to divest.

The guy was probably also super pissed that he was fired after only three weeks, after going through all the trouble of moving to LA.

I could certainly see that as being an issue. Can't go back, can't go forward, now sort of stuck.

it is probably a bit hard to prove competency/incompetency in just 3 weeks.

It can be in extreme cases, and in these situations it's better for both parties to resolve things quickly.

proving competency is more difficult in short order unless you end up an emergency situation and respond well, incompetency can be demonstrated in a day but at that level should be weeded up through a good interview process.

still I have seen developers gone in a weeks time, some voluntarily