I applied online. The process took 5 days. I interviewed at Jane Street (New York, NY) in Oct 2014
Interview
There was first a phone-screen where I was asked "brain-teasers" that mostly involved probability and other forms of quantitative thinking. It lasted about an hour. Then there was an on-site interview. We were given "money" at the start to trade with and had to keep as much as possible throughout the day. The rest of the interviews focused on hypothetical betting situations where we would bet our money and justify our decisions.
Interview questions [1]
Question 1
Imagine you would get $100 if you made more than n percent of your free-throws, and would have to pay $100 if you made less than n percent of the throws. Would you rather have 10 throws or 100 throws?
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