The process took 1 week. I interviewed at Jane Street in Nov 2011
Interview
Mental maths and probability... Interviewers were nice (if not too casual and relaxed, which made you feel stupid). Consists of several rounds of phone interviews and presumably onsite in the end. Not impossibly hard but they do tend to be a lot more difficult when you're on the phone without pen and paper.
Interview questions [1]
Question 1
Learn these questions posted. More or less similar.
I was qualified for the first round of the interview proccess. I was asked about the reasons why i want to become a Quant and why i applied in Jane street for this role. After I was asked two probability questions. The interviewer was ok but at some moments I wasn't sure if she was following my thoughts
Interview questions [1]
Question 1
Mainly I failied since I tried to give them a strict answer to one of the problems(which was impossible to calculate in this time) and the wanted to hear some intuitive approach which leads to approximately correct answer.
they spend a lot of time trying to understand your thought process. the interview question use simple scenarios and build from them to more complex ones to understand how you handle adversity
I applied online. The process took 2 months. I interviewed at Jane Street (London, England) in Feb 2026
Interview
First three rounds are probability and game theory questions then the onsite is trading games, coding and data science interviews as well as a behavioural interview. The interviewers were very nice and the HR department was very timely everything was organised very well.
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