WorldQuant interview questions

Two online tests. First one on Python at HackerRank with 3 quite simple tasks for 2 hours. Another one on maths/probability/statistics at internal platform. Test consists of two parts, a break between them is possible. Each task has limited time two solve, tasks in second part seemed way harder. Followed with invitation to a set of 3 interviews with researchers. Pleasant conversations, with tasks on algorithms and statistics.

There was three rounds (1st 2 rounds had 2 interviews and last round had 1). About 60 mins per interview where they ask behavioral and mostly technical questions. It was very tiring.