The exceptions usually come up in organizations with restrictive budget rules where they can tolerate the slower delivery schedule. For example, academic departments and non-profits may end up with some extra budget to spend that isn’t quite enough to hire a full person. Many of these jobs go to students, though.
Also watch out for companies that want the productivity of a 40hr week but to only pay for 15-20hrs.
You could consider trying your hand at freelance work. The downside is you will spend a lot of your time finding and landing clients.
Might be of interest
(I've had some success with this but by no means universally. Depends on how much trouble they're having filling a role, how much of a fit you'd be.)
I think the best bet is to be a freelancer or independent consultant and pick clients that are mostly concerned with delivery where your hours are mostly up to you.
Being self-employed is often much work, even at weekends. But I know some people, especially those in webdev, that did manage to reduce their time spend working a lot. Not at first though.