I'm a data scientist here, and the question we work on is a fundamentally interesting one: Which users on the internet are human? As a bonus, the people are smart, interesting, and pleasant to work with.
apply here: areyouahuman.com/careers
This is indeed interesting as a fundamental question. It might also be interesting to see how far one could go with the somewhat more applied question: which users on the internet are data scientist? I have been applying to data science and related positions for the last few months and now end up seeing various advertisement for "mapreduce this" and "deep learn that" which I found a bit mystifying as I can't many software engineering types that would actually want to click online advertisements.