I did go and get an online Masters of sorts (an MBA from WGU), which was definitely do-able while working full-time (and also useless), but it was nowhere near as rigorous and time-consuming as an engineering graduate degree would be :)
You work with PhDs, so can pursue your graduate interests directly from them while being involved in the research, and get paid at the same time albeit not industry standards, prepare for lower salary. Open AI hires developers too and plenty of researchers are there.
Having seen what poverty can do to someone I have always put securing my future financially over my education, in the hope that one day I can return to university and resume.
And I am one of the lucky ones who could afford / was explained benefits of an education from a young age.
Most of the value of an MBA is in the network, not the knowledge so distance learning and correspondence degrees are worth drastically less. You can get an MBA from the UK’s Open University or Queen Mary’s, University of London for a little over twenty thousand pounds or thirteen thousand tespectively.