I applied online. The process took 4 weeks. I interviewed at Jane Street (London, England) in Oct 2023
Interview
Phone call interview where they asked technical questions about probability and statistics. You can use a piece of pen/paper but you should explain your thinking out loud. There was an opportunity at the end of the interview to answer questions.
Interview questions [1]
Question 1
Probability and statistics questions: e.g. I am playing a dice game with a six-sided dice. I can roll the dice as many times as possible until I roll a 6 at which point I can't roll anymore.
The amount of points I get is the sum of the numbers I roll. However, if I roll a 6 (and have to stop rolling), then my score becomes 0.
What is the best strategy for the game?
Went through 3 rounds of interview, all of which were focused on math. they started with basic questions and built up to harder ones. Also some behavioral questioins at the start of each round
Applied online and passed the resume screen, got invited to a first round, didn't pass, was my first time interviewing for quant and nerves made me answer not quite at the best of my ability
Interview questions [1]
Question 1
In a game you are given a distribution of marbles, how to figure out the maximum payoff without knowing the colors
I was qualified for the first round of the interview proccess. I was asked about the reasons why i want to become a Quant and why i applied in Jane street for this role. After I was asked two probability questions. The interviewer was ok but at some moments I wasn't sure if she was following my thoughts
Interview questions [1]
Question 1
Mainly I failied since I tried to give them a strict answer to one of the problems(which was impossible to calculate in this time) and the wanted to hear some intuitive approach which leads to approximately correct answer.