I applied online. I interviewed at Citadel Securities (New York, NY)
Interview
Questions about your projects, motivation for the role and a few questions on how you would solve problems related to the job. Also a few statistics questions; No brainteasers. Not that hard but complicated to prepare for because the questions are specific.
I applied through a recruiter. I interviewed at Citadel Securities (London, England) in Oct 2025
Interview
4 interviews - behavioural & product focused.
They want someone who can seamlessly fit into the team and start adding value from early on.
Nothing too technical, few mental maths questions, expected value on coin flips and dice rolls.
Interview questions [1]
Question 1
What is 19 squared.
What is the EV of a die roll, what happens if I add n more die.
I applied through a recruiter. I interviewed at Citadel Securities (New Delhi) in Dec 2022
Interview
Interview rounds were of average difficulty. Focus was on how you react under pressure. Asked some hypothetical question related to trading. Basic Puzzles and coding questions in first round. Total 4-5 rounds.
Interview questions [1]
Question 1
Two sum problem with different time complexity, linearity of expectation problems.