I applied online. The process took 3 weeks. I interviewed at Jane Street (New York, NY) in Nov 2016
Interview
I took two rounds phone screen interviews with Jane Street. The people I talked to are pretty nice. They would guide you to understand the problems step by step. But they require you to react pretty quickly for answers, even if just guesses.
Interview questions [1]
Question 1
Probability and flipping coin games. Confidence interval is quite common thing they are interested
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