No, I'm doing what I would classify as "normal" developer work. Negotiation: I have had (on a sample size of 1) no luck getting this at initial employment, but I have managed (sample size of 2) to arrange it after working somewhere for a couple of years and building up trust and a reputation as an employee worth hanging on to. At that point I was able to get 4-day working set up following an RSI episode bad enough that I had to be signed off work for a few months and then got a medical recommendation for reduced hours, which my employer accepted.
Incidentally, this kind of thing is why I'm definitely not in the "job hop every year or two" camp.