I can fix/make electronics. Don't know how useful that is in a commune that probably doesn't have a lot of electronics. I guess I can keep the latte machine maintained and working.
Communist =! Luddites. Just because they're choosing to live in a different social structure does not remove them from modern technology. You'd still be useful, up-skill to basic power systems to keep the lights on and you'd be golden.
As a software engineer, skills I think I could contribute are systems design, debuging, writing software, and also trash pickup on the back af the truck. I'd be happy to help build software tools that help people actually enjoy life, and also I eon't mind pitching in to my community.