I applied through a recruiter. The process took 4 weeks. I interviewed at Jane Street (London, England) in Sep 2025
Interview
Initial Excel analysis task. Once completed successfully, they'll invite you to a problem solving interview (1hr) where they go through brain teasers and creative maths-based problems. Following this, they'll invite you to a technical coding interview, which is finally followed by final round in-person interviews.
Interview questions [1]
Question 1
Technical Coding Interview: "A trader asks you for the three largest trades made today. How would you find this information? What about the k-largest trades? How can you make this process more efficient?"
First the Simple CSV problems, need to check the files they sent to you and use the data in the file to calculate, not very hard, need to be careful since it mignt be a messy if you don't group the data in it. Then zoom
Interview questions [1]
Question 1
Dice Questions about the probablity and strategies
A screening test and then two online zoom interviews initially. First is maths combinatorics brainteasers (counting problems) with one speed-distance-time problem, and then the second interview is coding focused on your problem solving so language is irrelevant
I was only invited to the first round of interviews after the online assessment. The first round of interviews, they asked you lots of brain teaser and probability sort of questions