I am a big supporter of part time too. I can't overstate the importance of work-life balance. Work less, work better, and don't forget yourself nor your family.

However reading the description, I can't tell whether the potential hire fits this category.

Are they looking to have 2 jobs in parallel? What would their side thing be, is it different enough that they wouldn't be working on both concurrently?

If they want to be away from writing software 2 days a week to fulfill a hobby (e.g restore a boat, paint or whatever) then it makes a lot of sense. They will be happy, grateful, and the culture will be great.

If they are seeking part time in order to work for 2 startups or setup their own side business, then I'm not so sure.

It is the latter. I appreciate their honesty though, which makes the call that much harder. Their side projects are bitcoin related, far more than just a hobby.

Consider that allowing this perk may enable you to hire someone you'd never be able to get otherwise.

I -- and I'm not the only founder I know who has had this experience -- had to compromise technically on early hires because they were what we could get.