Me postulé en línea. Acudí a una entrevista en Jane Street (New York, NY) en jun 2015
Entrevista
Phone interview appied online and HR contact me to say that they wanted to move forwd with a phone int, she was very nice and my interviewer was also very nice w calm voice
Preguntas de entrevista [1]
Pregunta 1
How many digits in (100)^10
Strategy for winning one dollar for every heads in 100 throws of coin toss.
What question would you ask if you could ask one question to the person who knows the entire seq of the 100 coin tosses
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