I can see the idea that some jobs are incompatible with being a serious leftist. But Google is way too big and way too removed from the most direct harms of capitalism to make a blanket statement about Google employees.

We should also be careful about making litmus tests for leftism that require enormous life changes (e.g., quit your nice job and find something else) solely for the sake of ideological purity. Someone quitting their job at Google doesn't bring us any closer to socialism. If anything, stuff like the unionization attempts at Google (which wouldn't be possible without at least proto-leftists) moves the ball forward.