3 Rounds. First two were fine, last was more challenging. Leetcodish style questions. They gave us lunch after the second interview and some were sent home. Most people got offers the same day.
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.