Insight Program applicants have rated the interview process at Jane Street with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 63.8% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Technical interview, array manipulation, testing use of data structures, debugging skills, etc. Not like traditional interviews and more pair programming vibe, interviewer is kind of like a TA. Not extremely technically challenging, like a Leetcode easy.