I applied online. The process took 1 week. I interviewed at Jane Street (New York, NY) in Oct 2024
Interview
There was first a phone interview in which the interviewer asked 2-3 short questions and one multiple-part questions. The first ones were pretty easy, and the last one had a medium level. It lasts like 45 minutes. After that, there was a Zoom interview in which they asked 2 probability questions with a hard difficulty and lasted an hour.
Interview questions [1]
Question 1
Suppose you have a coin, and you flip it multiple times. What is the expected value of throws you need to have two heads or two tails?
online assessment and video call interview, asking probability and expected value type questions. pretty straightforward. The questions are quite difficult but interviewer is very kind and happy to work through questions with you
Interview questions [1]
Question 1
Imagine you have a 9-sided die, you get points corresponding to the face of the die after rolling, however, rolling a 9 ends the game and gives score of 0. what is your expected value of the game, how would you play?
I applied online. I interviewed at Jane Street (London, England) in Jan 2026
Interview
I did an interview in January. The interviewer was very nice and asked some probability questions. I answered the questions correctly but stumbled a bit. I didn't get a follow up interview.
Interview questions [1]
Question 1
The interview question was a probability problem, asking if 100 people are in the line and another line opens up, what should be my strategy. The follow up question was whether the answer was realistic and what would differ in the real world (and not assuing everyone makes decisions based on probability).
I applied through university. I interviewed at Jane Street (New York, NY)
Interview
stats questions—typical coin tossing games, probablility questions associated with it. very hard and did not pass the second round. not sure if i have a new shot. the recruiters are very nice though.
Interview questions [1]
Question 1
toss coins of values 1~5, something about expected value