Does Microsoft hire Linux folks?
Yeah, but you have to use WSL on a rusty 2008 server while Ballmer sweats on you. (Yeah, they hire all sorts of open source folk).
Yes, They've started writing desktop apps with Node+Electron, so you know even they've given up on Windows.
Yes, but you would be better at fb/goog
Yeah .. just look Microsoft careers you will find a bunch of openings
Yes