Applied online, the interview process consists of Three rounds of online interview, and one day of assessment Center. The process takes around 1 month total, all interviewers are super friendly.
I applied online. I interviewed at Jane Street (London, England) in Jan 2026
Interview
I did a Zoom interview.
The interveiwer was kind and asked me some probability questions.
I stumbled a bit but answered correctly in the end. However, I didn't get an offer so maybe they want someone who answers straight away.
Interview questions [1]
Question 1
Startegy of changing a line.
Is this a realistic strategy? What would change in the real world?
Technical interview round 1 and 2. Two math problems/brain teasers. Round 1 is easy, but round 2 becomes more challenging. Problems are well designed with multiple follow ups. Interviewer super friendly and nice. Great people and nice culture.
Very friendly interviewer and relatively easy questions. Quite organised in their interview process, with clear guidelines as to how to approach the interview. Focus is to explain the rationale and not just get the correct answer.
Interview questions [1]
Question 1
Probability of raining on sunday or saturday based on individual probabilities. Give upper and lower bounds on the probability of the union.