There must be plenty of 50+ year old EE developers that can do that, probably very cynical neck-beards by now, or even retired. Most people move into better paying roles so it is hard to buy them, and you duck your resume by taking on low-paying work (even if you paid highly, the next gig won’t).

There was so much low-level microcontroller dev work in the past, but perhaps that has mostly moved overseas now?

I used to do that work and I am not working at present, but I’ve moved up the stack a long way since then, so my pay and working condition expectations are probably ridiculous. And I don’t want to move from New Zealand!