Einstein was working in a patent office because he had trouble finding any work related to what he liked doing after his applications for various professorships at research universities failed.

A full time phycisist already tends to work a lot of overtime hours to get anything done, while already doing that as their main fulltime job activity, so with 100% certainty Einstein grinded like a madman in afterwork hours to do his actual research. This is also why he quit that patent office job as soon as he was able to.

Not to criticize your approach. genuine 0.1x programmers allow 10x (aka 1x) programmers to exist and get a lot of money doing a normal job.