well i say 'free jazz' which is a genre i do love but really most of what i listen to these days is not any kind of jazz at all - although it is generally played with 'jazz' instruments. not exactly chill and comfy though, in fact often quite the opposite!
i don't do any coding but i do spend a lot of time on the computer and have music going constantly, mostly free improvisation and free jazz, also some 'experimental' internet radio stations and some plain old classical stuff. my preference is for instrumental music without vocals