J'ai postulé via un recruteur. Le processus a pris 3 semaines. J'ai passé un entretien chez Jane Street (New York, NY) en mai 2025
Entretien
Two technical screens, followed by actual onsites. Offices are beautiful, and they give you some swag for coming onsite.
They ask "practical" problems, not really LeetCode style, but not necessarily realistic either. The problems aren't necessarily hard, but my advice is to go with the simplest solution, as you've got no guarantee that your interviewers will understand anything beyond that. My first interviewers seemed absolutely baffled by the idea of a completion handler function, so a lot of time was lost trying to explain to them how that would work, before changing to a simple user-polling approach.
Questions d'entretien [1]
Question 1
Given a basic API for a low level disk drive, implement a file system that can read and write.
It was a very quick and painless process. Recruiter very responsive, kind interviewers. High implementation and difficult problems, so failed onsite after 3 interviews and a Question and Answer Session.
J'ai passé un entretien chez Jane Street (Londres, Angleterre)
Entretien
Did not pass the initial coding round. I tried to explain my thought in details to the interviewer but failed to translate my thought into code. So far interviewer is very nice.
J'ai postulé en ligne. J'ai passé un entretien chez Jane Street (New York, NY)
Entretien
My experience interviewing at Jane Street was definitely challenging, but also surprisingly collaborative. Instead of focusing only on whether I could get the right answer quickly, the interviewers were much more interested in how I approached problems and explained my thinking. I worked through a few coding questions involving data structures and algorithms, and there were also some probability-style questions that tested logical reasoning. The interviewers were clearly very sharp, but they were also approachable and encouraged me to talk through my thought process the entire time. When I got stuck, they would sometimes guide me with small hints so we could keep exploring the problem together. Overall, it felt less like a typical high-pressure interview and more like a thoughtful technical conversation with experienced engineers.
Questions d'entretien [1]
Question 1
“What is the expected number of coin flips needed to get two heads in a row?”
