I applied through college or university. The process took 2 months. I interviewed at Jane Street in Feb 2020
Interview
There were 3 phone interviews before I was rejected. The first one was easy and contained 7-8 basic probability problems. The second one was a bit more complicated, there were about 3 questions from game theory together with some probability. On the third interview I was asked to solve only one under determined problem. It was not actually so difficult, but It took me a lot of time to come up with a solution, so I think this was the reason for being rejected afterwards.
Heard Jane Street has exciting internships for female students so I decided to apply. Filled out online application. Received a response for online assessment. The assessment was quite difficult for me. The interview was even harder. Lots of technical questions.
Interview questions [1]
Question 1
Two players, flipping a coin until one player wins. A wins if the roll ends with HHT. B wins if the roll ends with HTT. What are the odds B wins the game.
very hard and demanding. they are very selective. they like puzzles and pushing you to think out loud. interviewers are nice though. would possible try in the future. maybe. will see
Asked to play a game and probability - the probability questions were easy, and the game had very little math. It was over an hour, closer to 1 hour 30 minutes. Over zoom