I applied through an employee referral. I interviewed at Jane Street
Interview
Three rounds of phone interviews of increasing difficulty, each asking roughly 3 probability questions (no fit questions). For the harder problems, pen and paper were permitted. Each interview lasted about 30 minutes.
The interviewers were helpful in clarifying doubts regarding the questions. Usually, they will have follow-up problems if you solve it too quickly (probably to ensure you haven't just memorized the answer).
Interview questions [1]
Question 1
(3rd Round) You are given a deck of cards with numbers 1, 2, ..., 100 and 2 boxes. Flip a fair coin 100 times, place the respective card in the left box if H, right box if T. Find the expected minimum card in the box with card 100.
I interviewed at Jane Street (London, England) in Jan 2026
Interview
einen runden spiele am Vormittag und dann programmieren am nachmittag.
Biem spiele hat man parallel wetten sollen, also ein buy and sell zwishudn ein sechseiiger Würfel und sowas. oder karten wetten auf das die karte rot ist und zwischen 5-9 was zahlst du für diesen output und so. anrfang rechnen danach abschärtzen udn Ergebnisse interpretieren
Overall, it was a pleasant interview experience. I answered a few personal questions and encountered one that was slightly confusing, but the interviewer was friendly, and the conversation flowed well overall
Probability questions, nothing crazy but quite open ended, they want to know your thought process and calculations. Pen and paper allowed but no calculator. No OA, a few rounds and got rejected. Zoom call with a trader.