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.
I applied online. I interviewed at Jane Street (London, England) in Mar 2026
Interview
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.
Interview questions [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.