Comment by dagw

All the engineering companies that aren't software engineering companies. I work for a largish civil engineering and urban planing consultancy and we deal with all kinds of hard and interesting technical problems like this all the time.

The main downside is that the software development culture in these companies are at least a decade behind the state of the art and you will have to deal with weird things like TFS 2012 and no one having heard of the phrase "Unit Test". On the upside since there is no software development culture in place, there is less argument when you tell them you're moving all your code to gitlab and want to use F#.