Acudí a una entrevista en Jane Street (Londres, Inglaterra)
Entrevista
Jane Street's quant interview is rigorous, emphasizing probability, mental math, game theory, and logic puzzles. It tests deep problem-solving skills, clear communication, and speed, often across multiple high-pressure rounds. Multiple rounds involving maths, probability, coding, games..
Preguntas de entrevista [1]
Pregunta 1
Alice and Bob each have a coin and flip it until they get a heads. If Bob flipped his coin more times than Alice, what is the expected number of times Alice flipped her coin?
Envié una solicitud electrónica. Acudí a una entrevista en Jane Street (Londres, Inglaterra) en ene 2026
Entrevista
I did a Zoom interview.
The interveiwer was kind and asked me some probability questions.
I stumbled a bit but answered correctly in the end. However, I didn't get an offer so maybe they want someone who answers straight away.
Preguntas de entrevista [1]
Pregunta 1
Startegy of changing a line.
Is this a realistic strategy? What would change in the real world?
Technical interview round 1 and 2. Two math problems/brain teasers. Round 1 is easy, but round 2 becomes more challenging. Problems are well designed with multiple follow ups. Interviewer super friendly and nice. Great people and nice culture.
Envié una solicitud electrónica. Acudí a una entrevista en Jane Street
Entrevista
Very friendly interviewer and relatively easy questions. Quite organised in their interview process, with clear guidelines as to how to approach the interview. Focus is to explain the rationale and not just get the correct answer.
Preguntas de entrevista [1]
Pregunta 1
Probability of raining on sunday or saturday based on individual probabilities. Give upper and lower bounds on the probability of the union.