Don’t work for evil companies.
I tried to do this out of undergrad (graduated last year). Many companies do both good and bad things to me, some more good than bad. The "best of the best" companies to me require many years of experience and are still competitive. I didn't really want an entry level job at an "evil" company, so I'm going to go do a PhD (in something unrelated to my original interest in operating systems, as I don't want to be a 30k…
It is very, very, very hard because you're making it hard by insisting on finding a strong intersection with your set of interests.
Half the jobs I've had aligned well with my interests. They were also in the lower half of jobs I liked. The best jobs I've had were the boring ones. It turns out, there's a lot more to jobs than just what you work on.
The most important thing is to keep a roof over your head. Next is saving for retirement. And then there are things like work environment, the people you work with, team dynamics, the actual technical work, etc.
I've found that the most intellectually fun/challenging work was usually coupled with the most dysfunctional teams. It's likely just a coincidence, but it was a good lesson that other things matter at least as much.