Had two phone interviews, both focusing on math and probability questions. Never heard such questions before. All I reviewers were traders. Lasted around 40 minutes. No HR style questions were asked.
Ho sostenuto un colloquio presso Jane Street (Londra, Inghilterra)
Colloquio
Mental Maths and basic maths and algebra questions, market making questions followed by trivia on financial markets. They then asked if I had any questions for the company or people who worked there.
3 Rounds of telephone interviews focussed on probability and games. In particular, games involving coin flips were popular and having to come up with the optimal strategy for the game. They became progressively harder. I did not progress further than this.