I applied online. The process took 6 weeks. I interviewed at Jane Street (London, England) in Oct 2014
Interview
3 phone interviews, 1 interview day at their offices.
Phone interviews got progressively longer and harder.
Interview 1: Basic probability questions (dice rolling, card games). First question: If I have a 0.7 chance of getting wet on Monday, and a 0.8 chance of getting wet on Tuesday, what is the chance I stay dry on both days?
Interview 2: Estimation questions - eg: give me a 10% confidence interval on the mass of the earth
Interview 3: More trading based games. Eg, we play a certain game with certain probability-based rewards; how much would you pay to play the game?
At the office day I had 3 interviews (all on my own, with either 1 or 2 interviewers). I was given poker chips to bet on all the games we played in the day.
Interview 1: Market making games with dice and cards
Interview 2: Harder market making games with dice and cards
Interview 3: Lateral thinking problems (for lack of a better description)
Interview questions [1]
Question 1
Give me a 10% confidence interval on the mass of the earth
I applied online. I interviewed at Jane Street (Chicago Ridge, IL) in Jul 2024
Interview
The interview was hard and very challenging. It involved a lot of Statistical questions and theory, mainly probability theory. I had to show my quantitative problem solving skills and technical ability in coding
Interview questions [1]
Question 1
They asked me about hackathons and Math Olympiads I have written
Standard interview for them, a call with some probability questions. If you get three questions right you pass, otherwise just hope for the best. Onsite is where it gets interesting but didn't make to there
Application by web form, received an online test later, then I had the first round interview online, doing some brain teasers questions, which msy be quite different from those you found in green book, more complicated and practical. The interviewer is smart but quite arrogant.
Interview questions [1]
Question 1
What is the strategy to optimise the payoff or minimise the loss