RMS hasn’t had a paid job as a programmer for 40 years as far as I know. People say he was homeless and living in his office at MIT while working on GNU in the 80s.
Isn’t he basically a speaker and advocate nowadays? That career is unlikely to be very successful now that all major organizations dumped him and he has fake news headlines saying he defended Epstein following him everywhere (backed up by apparently two decades of known antisocial personal behavior).
He doesn’t exactly sound like the kind of person you’d hire to work as a normal developer nor would that comport with his strange ethics of refusing to use any non-Free software.