Acudí a una entrevista en Jane Street (Londres, Inglaterra) en feb 2024
Entrevista
The first stage was a timed online quiz about basic probability and statistics. The second stage was a more technical interview about dynamic programming and basic probability. Then, the third stage was again an interview but harder. The interviewer would lead you. Didnt manage to survive further. Overall very good experience.
The process was structured and intellectually challenging. It typically involves an initial recruiter screen, followed by probability, mental math, expected value, and game-style problem-solving interviews. Interviewers focus more on reasoning, communication, and adapting to feedback than memorized answers.
Preguntas de entrevista [1]
Pregunta 1
You have two opaque boxes in front of you. At each turn, you may choose one of two actions:
Place: put one coin into one of the two boxes, chosen uniformly at random.
Take: choose one of the two boxes uniformly at random, take all the coins inside, and empty that box.
You play for exactly 100 turns. Your goal is to maximize the expected number of coins you collect.
What is your optimal strategy?
Several phone calls to go to the final round. The phone calls consists of mathematical, probabilistic brain teasers which was not that hard for a mathematics major. Final round was to harsh for me, strong mentality is required
Me postulé en línea. El proceso tomó 4 semanas. Acudí a una entrevista en Jane Street (New York, NY) en abr 2026
Entrevista
Lots of expectation/probability questions. Make sure to study game-theory type question that involves expectations. Specific concepts in stochastic processes don't seem that important. The first two were relatively easy. Just make sure to ask a question if there is any uncertainty