I applied online. I interviewed at Citadel in Sept 2025
Interview
Interview after submitting the application. They had an OA then a technical round where I had to code in leetcode medium~hard. The people there were really nice though. I learned that I have a far way to go.
Other Quantitative Researcher interview reviews for Citadel
- Questions on Linear Algebra and Coding
- Discussion of a problem at the intersection of optimization and classical machine learning
- No behavioural questions or anything about my personality or work experience, the interview was purely technical
Interview questions [1]
Question 1
- Explain how to compute a product of two very large matrices in a computationally efficient way, using the structure of the problem and the matrices
Start with my own self-introduction and the interviewer's self-introduction first for five minutes, then a couple of technical questions for like thirty minutes, and in the end, questions for the interviewers about the company.
I received the interview a few weeks after applying online. During the interview i was asked by the interviewer about my past experience and also some other related technical questions.
