It consisted of two questions, a general math problem and a probability question. The first question was quite straightforward but took me 15-20 minutes to figure it out, which apparently was too long cause the interviewer seemed to have got disappointed at that point and continued the session with a very easy probability question (related to Bayes formula.) Got rejected a few days after that interview.
Interview questions [1]
Question 1
Don't remember but something to do with the speed of an escalator.
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.