At least 3 phone interviews and then final interview in the Jane Street office. So far I had only 1 phone interview and passed and I'm waiting for my second one. They ask brain teasers and probabilty questions. They've asked me qustions like:
1) Angle between clock ticks at 9:30
2) Probability that it will rain on the weekend if the probability that it will rain on Saturday is 40% and on Sunaday is 50%.
3) 1000000-121