The interview was fair, had 4 phone rounds followed by an on-site. The on-site was quite fun, but unfortunately I messed up big time in one round. I was overconfident in my estimation (which turned out to not be correct, but this was not the problem) and as a consequence lost a big deal of the capital I had assigned for the game.
Interview questions [1]
Question 1
Standard dice questions in the phone interview, probability and stats-based games in the final round
Multi stage interview process, lots of probability and maths questions, mainly about expected value and optimal strategy for games. First round fairly straightforward. No online assessments or early stage HR rounds
Interview questions [1]
Question 1
You are playing a one-player game with two opaque boxes. At each turn, you can choose to either "place" or "take". "Place" places
$
$1 from a third party into one box randomly. "Take" empties out one box randomly and that money is yours. This game consists of 100 turns where you must either place or take. Assuming optimal play, what is the expected payoff of this game? Note that you do not know how much money you have taken until the end of the game.
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?
Quant Internship applicants have rated the interview process at Jane Street with 3.4 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 57% positive. To compare, the company-average is 63.8% positive. This is according to Glassdoor user ratings.
Candidates applying for Quant Internship roles take an average of 4 days to get hired, when considering 7 user submitted interviews for this role. To compare, the hiring process at Jane Street overall takes an average of 17 days.
Common stages of the interview process at Jane Street as a Quant Internship according to 7 Glassdoor interviews include:
Phone interview: 57%
Skills test: 29%
IQ intelligence test: 14%
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