None of the big software companies have remote development cultures, and most don't even have serious offices away from HQ. You can work for Google or Facebook away from SFBA, in a couple of smaller satellite offices, but it'll limit the kinds of things you can work on.

None of those companies are going to restructure their engineering cultures just to relieve housing pressure in SF. Just like the rest of the mainstream, they probably see the problem in SF as one of artificially limited supply, not demand.