In Germany you can request to work part-time (30h per week), it's in the constitution, of course, you get paid 30 hours.
It's really common, it's so common that the average work week here is 35/h.
Most people I know work the default 40h, but as people get older they typically opt-in to work part-time.
So if you aren't from Germany, one thing you can consider is moving here. It has a good/stable tech job market. Salaries are nowhere as close to the US, but I'm sure you'll be a more interesting person after a few years here, living a more cultural diverse experience.