Software errors, i.e. bugs, can really wreck your day. It's not just crashing webpages—software is everywhere from cars to power stations. Bugs in the wrong place can be life-threatening. QA Engineers design and run tests that catch bugs. Their job is about breaking software and documenting the results. QA Engineers don't need to know math or programming languages—they do very little coding, and what little they do involves simple commands and logical sequences. As important as QA is, it's one of the simplest jobs to learn.