I applied online. The process took 2 weeks. I interviewed at Jane Street in Dec 2018
Interview
Everything was quite professional and seemless. I have been called via cellphone and first round took 30 mins and it was with the one of senior researchers in NY, they clearly described the process and also what they do inside
Interview questions [1]
Question 1
It was a problem that is similar to the ones in the high school, nothing special
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.