I applied through a staffing agency. The process took 3 weeks. I interviewed at Jane Street (London, England) in Sep 2025
Interview
CV screening > take-home task > logic & maths interview > programming interview
Explain your thought process clearly, they give hints if you get stuck in the interview.
Interviewer didn't seem very interested though
Interview questions [1]
Question 1
Financial haircuts on Excel via Hackerrank
Probability of getting a three digit number with X condition
Speed questions
Very easy compared to the other roles at Jane Street. Got asked Probability, coding, brainteasers. Basically a mix of Quant trading and Software Engineering questions. First and Second round were much easier than final onsite round.
The interviewer was extremely kind, approachable, and supportive throughout the entire process, which made the overall experience much more comfortable and less stressful. The questions were largely similar to typical LeetCode-style problems, focusing on core data structures and algorithms. In addition to the coding-focused rounds, one of the initial rounds specifically tested mathematical concepts, which required a strong grasp of fundamentals and logical reasoning.
going through resume, explain your past experience and projects. why the company jane street and role of trading desk operations engineer intern. then logical reasoning and brain teaser type questions .