You could make a deal with them. You work 3 days/week on that, for fulltime compensation, and the other 2 days you could start something yourself or learn some

You could make a deal with them. You work 3 days/week on that, for fulltime compensation, and the other 2 days you could start something yourself or learn some technologies you always wanted to spend time on. Or contribute to some OS thing that you always wanted to work on. In other words, improve your skills/knowledge/resume.