It was good . The questions were hard but really insightful . The employees were helpful and gave hints during the interviews if you get stuck on a question . The online screening tests are difficult .
Interview questions [1]
Question 1
One question was on markov chains and another on game theory.
Basically on my previous work experience, research and trading experience, no technical questions. They finally decided to move forward with more senior candidates with 5 or more YOE. (I only have 2).
3 rounds of interview covering CP, puzzles and some basic statistics and probability
Great experience, puzzles were quite original, CP problems were relatively harder compared to other companies around (1900-2100 in terms of CF difficulty)