Jane Street Software Engineer interview experience

I started by asking a couple of clarifying questions to make sure I understood the target behavior, and then I coded through the solution while checking in with the interviewer’s expectations. The questions leaned more toward design/iteration than pure algorithm trickery, and I could feel they cared about clean structure more than squeezing out the last bit of efficiency.

As I worked, I got gentle hints to help me implement the better version of the approach. The interviewer was friendly and treated it like a problem-solving discussion—keeping the focus on progressing with correct logic.