Engineering has for a long time had these sorts of issues, mainly with weapons manufacturing. I honestly have more sympathy for a 20th century mechanical engineer choosing to go work for a defence contractor than a 21st century software engineer taking a lucrative job at a company like Palantir or today's twitter, because there are so many decent paying more ethical alternatives.

There's not even anything especially technically interesting about working for the evil side of silicon valley! At least working for Lockheed can mean helping design an amazing beautiful death machine, and lead to some complicated feelings on one's deathbed. But if you worked on Nazi Grok? That's just embarassing. Forget the banality of evil, it's the cringe of evil. Nobody is going to look at you like some kind of Oppenheimer tormented genius at a dinner party.