Three phone interviews, gradually getting harder. Mental maths questions eg 36^2, and brainteasers involving dice and coins. Required calculating combination numbers and probabilities associated with dice/coins.
Interview questions [1]
Question 1
Roll a dice, payoff is number shown. a) What's the expected payoff? b) If given the chance to re-roll, when should you re-roll? What's you expected payoff now?
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.