I applied through an employee referral. The process took 3 weeks. I interviewed at Citadel Securities in Sept 2025
Interview
Two phone interviews, and then a potential final round. The first phone was a technical with some math game theory/markov chain problem, and the second phone was with the head of research, where he asked more finance-focused questions.
Interview questions [1]
Question 1
First round: Randomly flipping coin to go up or down 1 point, probability to lose all your points given you start at n coins
