I applied through university. The process took 2 weeks. I interviewed at Jane Street (Hong Kong) in May 2023
Interview
The interviewer was extremely helpful and collaborative. He dropped hints during conversations that you needed to pick up. In general, the process was rigorous, but the quenstions were enjoyable to solve.
Interview questions [1]
Question 1
2 people make bids from 1 to 100. The highest bid is reduced by 10. What should be your strategy to maximise your probability of winning the auciton?
The process began with serveral online tests for maths and logic. They gave a personal interview to get to know the candidate better and evaluate fit for the company/role, then held a technical interview covering maths and logic problems.
Fun and filled with unexpected questions. The questions rely on fast thinking and fast calculations, and sometimes intuition because there is no sufficient time for me to work through the whole problem.
We started with a bit of small talk, followed by some probability questions. Ended with some basic algebra questions, Make sure to ask questions if you have any. Good experience, feels like the interviewer was trading.