I applied online. I interviewed at Citadel Securities (New York, NY) in Jul 2025
Interview
One round 45 min tech screening, the interviewer was nice, but the interview was changed 15 mins before the meeting. So the interview was moved to midnight. But the talking was good and the interviewer was nice.
Interview questions [1]
Question 1
A statistics question about evaluating trading strategy.
Long telephonic and video interview. Maths, probability questions and a small programming assignment. Moderate difficult interview level. Motivation/ interest to join cit sec. Started
on time and very efficient use of time
It was mostly about coding. I was first being asked to share my research experience followed by a Q&A, and then we moved on to a DP problem. Since we discussed my research for ~ 40 min, I didn't have time to finish testing my code.
I interviewed at Citadel Securities (New York, NY)
Interview
Internal matching process, then straight to a technical round. Technical Interview, some probability (brainteaser style, refresh conditional probability and Markov Chain) and linear regression, plus some coding puzzle (leetcode style medium)
Interview questions [1]
Question 1
Anything you know about linear regression and related follow ups
