I applied online. The process took 1 day. I interviewed at Jane Street in Oct 2011
Interview
The lady who interviewed me was very nice. She asked me several mental math questions, then some probability questions, and then some problem solving questions. Most of the questions weren't too bad, but you're supposed to do it all in your head. So that made it tough. A lot of the questions were pretty similar to the ones other people have been posting on here.
Interview questions [2]
Question 1
If two equally talented teams are playing in the world series, what's the probability the series goes seven games?
A bus pulls up to a stop. 3/4 of the people get off and 7 get on. The bus goes to two more stops with the same results. What is the smallest number of people that could've initially been on the bus?
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.