J'ai postulé en ligne. J'ai passé un entretien chez Jane Street (New York, NY) en oct. 2025
Entretien
First round interview, 60 minutes, mostly technical (not standard LC, iterative design question, clean code prioritized over efficiency), then 10 minutes at the end to ask questions. Interviewer was very friendly. Didn't pass to second round as I don't think I completed enough iterations, expected to think fast.
Questions d'entretien [1]
Question 1
Design a code editor (i.e. filling out given functions, not the whole system), to track blocks of code, then follow up with iterations to support things like code folding
J'ai postulé en ligne. J'ai passé un entretien chez Jane Street (Londres, Angleterre) en mars 2026
Entretien
I skipped the OA and was directly contacted for a coding interview. It was quite dry. They didn't ask any behavioral questions and jumped straight into coding. The coding question itself was super easy - a simple stack problem of keeping track of parantheses. The extension asked to make a visual editor (so it was a bit more OOP) and simply remember the positions of the parantheses from the previous subtask and do some string manipulations depending on if you encountered a paranthesis there.
Questions d'entretien [1]
Question 1
Design a visual code editor that collapses code blocks.
Collaborative problem solving, not like leetcode style. For of system designing and low level programming: visual machine, compilers. There is no special needs to prepare, just be familiar with the language chosen and think aloud.
Skipped past the OA, straight to first interview after resume screen. Then it was a 45 minute live coding round. More design style question than traditional leetcode. Did not make it past the first round.