I applied online. The process took 2 weeks. I interviewed at Jane Street in Mar 2015
Interview
Very quantitative and they will easily challenge your train of thought in order to see if you can react quickly to support or adjust your answer. Virtually every question they ask has a purpose to it, for example, how confident you are of your answer(s). Interviewer was very helpful, they understand if you may not see the purpose behind a question, but they do expect you to very quickly adapt if they start giving you hints.
Interview questions [1]
Question 1
Probability: Dice, Shooting Darts, Expected Values, Conditional Probability
I had a phone screening call from a recruiter, they asked some standard probability questions, bayes rule, and expected value about dices. Overall experience was pretty good. Make sure you prepare your probability
Interview questions [1]
Question 1
Expected value, if throwing a dice, 2 dices and 3 dices with option to reroll.
I applied online. I interviewed at Jane Street in Nov 2022
Interview
Very smooth. Around 30mins first round 1hr for the second round. First round consisted of easier probability based questions. Second round was similar but harder and longer questions. The interview process if approached in a calm composed manner should be easier to analyse
multiple phone interviews and a full-day Zoom interview. Interviews got longer and longer over time, but every person was very kind and helpful with hints when I got stuck. The questions get harder as the rounds progress and generally don't have a closed form answer in the later rounds
Interview questions [1]
Question 1
they describe the rules of a game and ask if you want to play it based on your expected earnings