Can you do your personal programming at work? Just stay an extra hour or two. That might not align with management/company culture, but maybe you can make an effort to change that.

It's expensive, but electronic music production can be a lot of programming, and offers a whole new set of challenges to solve. It's a great activity that is analogous to computer programming depending on what tools you use. Obviously much more refreshing to come home to after work. If you're not trying to just improve your coding ability and knowledge, I think you could really enjoy this.