nowadays I do -- well, fudging slightly but you could describe it as "industrial automation control". writing libraries to provide convenient abstractions for controlling industrial equipment, writing robust scripts to drive that equipment, run physical tests on the $widgets we make, aggregate the experimental data, store it, etc. in the interviews they liked how (in my DS job) I had taken existing inefficient excel based workflows that had human-in-the-loop, and automated them, made unit tests, wrote docs, considered failure modes that nobody had considered before, things like that. and I just read about a fuckton of different stuff. for example in the interviews they wanted to know if I had worked with concurrency, I said I hadn't because it just didn't come up in the work I did. but I knew a little about it because I read voraciously, then I was able to answer all the theoretical questions they posed about locks and threads and async and so on. obviously that didn't mean I really knew about concurrency (that's a kind of deep metis that can only be acquired by practical experience and I'm still only scratching the surface of it), but it demonstrated that I had curiosity to learn about the field outside of the immediate things I worked on day to day.
during that job hunt I also had a strong offer from a company that wrote software for the visual effects industry and they wanted someone to improve their automated testing and continuous deployment frameworks. I didn't know much about CI but I knew about testing (pytest and hypothesis and things like that). they liked me talking about that kind of thing.
hope that helps.
so I jumped ship and became a software engineer. better pay and more interesting problems.