I've worked part time as an engineering manager before. Anything from 80% down to 50% (after my kids were born, when trying to start a startup on the side, etc.

I've worked part time as an engineering manager before. Anything from 80% down to 50% (after my kids were born, when trying to start a startup on the side, etc.). It's usually possible to scale your work to suit the percentage you want to work. However, in all of the times I tried to do this part time work, I failed to strike the balance I wanted. The reason for this is that your colleagues aren't working the same schedule is you. They may not know your reduced schedule (even if it's in you calendar) or they may just not care. But it's very hard (at least for me, YMMV) to ignore phone calls, texts, slacks and emails when your teammates (or people who report to you) are asking for help with something. So I think for this to work, it would need to be ingrained into the company culture.