Mostly class and system design questions. They care a lot about efficient design, clean and organized code, and readability, rather than over-optimizing for performance.
Some algorithmic knowledge is helpful, but not worth it to overstudy Leetcode.
The following metrics were computed from 72 interview experiences for the Jane Street Software Engineer (Internship) role.
Jane Street's interview process for their Software Engineer (Internship) roles is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Jane Street's Software Engineer (Internship) interview process.