I applied online. The process took 2 weeks. I interviewed at Jane Street (London, England) in Oct 2023
Interview
It was done by a quant trader who came from a similar university and did a similar major/subject. He was smart and quick, the interview was fairly difficult. I think he cared about speed and correctness, not just method.
Interview questions [1]
Question 1
It was something like two players flip coins until one gets three heads. They take turns. Given that I go first and get heads, what is the probability that I win.
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.
they spend a lot of time trying to understand your thought process. the interview question use simple scenarios and build from them to more complex ones to understand how you handle adversity