What I've heard is that they target graduates from elite schools, bonus points if you did maths or CS competitively. Everything else, including OCaml and financ

What I've heard is that they target graduates from elite schools, bonus points if you did maths or CS competitively. Everything else, including OCaml and finance, they claim that they can teach you. Although they always go to functional programing conferences like ICFP to promote their company, so they must hire language experts as well. I applied there 15 years ago. They asked me some logic puzzles and some typical quant interview probability questions. It wasn't about OCaml at all even though I do have an OCaml background and I thought I interviewed for a SWE position. I remember the interviewer was unpleasant for no reason. A friend of mine interviewed there recently, he got some typical leetcode questions (hard ones).