I applied online. The process took 3 months. I interviewed at Jane Street (New York, NY) in Nov 2023
Interview
Very conversational, but to the point. No behavioral questions and strictly math and probability questions when sitting down to interview, there’s no small talk and interviewer gets right to the questions.
Interview questions [1]
Question 1
Suppose you have two urns that are indistinguishable from the outside. One of the urns contains 3
one-dollar coins and 7 ten-dollar coins. The other urn contains 5 one-dollar coins and 5 ten-dollar
coins. Suppose you choose an urn at random and draw a coin from it at random. You find that it is
a $10 coin. Now you are given the option to draw again (without replacing the first coin) from either
the same urn or the other urn. Should you draw from the same urn or switch
There was a few phone interviews that involved probability and game theory questions. Before a final round interview in hong kong. Interviewers are very nice best to describe your thought process
Interview questions [1]
Question 1
They asked me probability and gamer theory questions.
Interviewed for two rounds. I passed the first round last year so was able to continue immediately with the second this year. Probability/game theory questions. The interviewers are friendly and helpful.
Interview questions [1]
Question 1
If you roll a dice and receive that amount in dollars but have the option of rerolling up to two times, how much would you like to pay to play this game?
Jane Street’s interview process is fast-paced, multi-round (But if you have a deadline they will react accordingly) , and deeply quantitative: mental math, probability puzzles, game theory..., and conversational talk just before you start doing the problems
Interview questions [1]
Question 1
Some basic probability questions (more like brainteasers) involving expected values and markov chains. You should brush up on the greenbook and be comfortable with n-sided dice and strategies involving dice in general.