Funny you say that because the most popular 3D printer firmwares are open source. Does QA’ing 3D printer firmware sound fun to you? No? Great well you don’t have to do that someone else is literally doing that right now because they thought it was fun.

By the way this is a decent job for an apprentice under supervision. It’s a good way to learn with minimal risk and young people are often willing to do this kind of thing. Then the veteran comes in and makes a few improvements to the QA system and hopefully it’s good for a while.