3 rounds, 1st round market sizing similar to consulting cases. 2nd round take home paper to prepare 3rd round in office interviews with multiple people about data manipulation and basic finance
Phone Interview was the second part and was technical-based after a take-home exercise. After that, there is another technical, and then an in-person interview which are all pretty tough. Make sure you practice a lot
J'ai passé un entretien chez Jane Street (New York, NY)
Entretien
3 rounds; first part is a take-home exercise. The second part is a phone interview that is mainly just market sizing questions. The interviewer was very direct, and got into the questioning right away