J'ai postulé en ligne. Le processus a pris 3 semaines. J'ai passé un entretien chez Jane Street
Entretien
I applied online and heard back from them within a week. The first phone interview was relatively smooth and was focused on basic functional stuff. They were very interested in my ability to analyze the time and space complexity of recursive functions in an immutable environment. Also, very interested in optimizations.
For the second interview they expected me to know some OCaml but it was much the same as the first. The last interview was an array question and not functional at all.
Each interview was about a week apart. Overall, everyone I spoke to was pretty nice. Obviously some were more helpful than others. In the very least, the interviews were great experience, and I learned a bunch of interesting stuff while preparing for them.
Questions d'entretien [2]
Question 1
Right a method that takes an int and an array and rotates the array right n times. Give an answer with constant space and linear time.
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?”