Round 1 was so hard I couldn't answer anything. It was about designing a class given another class. You don't need to run the code; they just want to test your problem-solving and technical expertise given a high-level abstraction.
Class Design: Object-Oriented Programming (OOP) given high-level abstraction.
The following metrics were computed from 21 interview experiences for the Jane Street SWE Intern role in United States.
Jane Street's interview process for their SWE Intern roles in the United States is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Jane Street's SWE Intern interview process in United States.