I applied through a recruiter. I interviewed at Citadel (New York, NY) in Jan 2019
Interview
Citadel's interview process was the most thorough I have experienced, ranging from technical expertise to personal views and workflow. While it may feel like a bit of a battery, once through, it is exceptionally rewarding as you come away knowing that they would like to make an investment in you.
Interview questions [1]
Question 1
In addition to others, I was given some standard pricing questions.
phone screen, then OA, then interview, asked the classic question "what's your biggest strength and weakness?", coding interview is 2 hard leetcode Dynamic programming. very difficult, no hint from interviewer
Normal interview process, not too lengthy, hr was very nice and replied to all my emails. The questions were a bit hard, and it needs some preparation before going into the interview.
I applied online. The process took 6 months. I interviewed at Citadel (London, England) in Nov 2024
Interview
HR interviews then met different people and was asked to do a case study involving data analysis using Python.
In the end I never really received a feedback and I am not sure if they even looked at the case study