I applied through college or university. I interviewed at Jane Street (Hong Kong) in Aug 2013
Interview
Saw intern position as in uni career hub. emailed my resume and finishes application in their website. Heard back from them in 3 days and got interviews in 6 days. 3 or 4 rounds phone interviews. Very efficient email communication. Friendly and supportive interviewers.
Interview questions [1]
Question 1
Toss a fair coin between two people. If it end with HHT, A wins the game. If it ends with HTT, B wins the game. Whats the probability of A wining the game.
Many rounds of brainteasers, some of which are more rapid fire in nature and others which require you to flesh out a detailed answer to a complex problem. Be well rested and well prepared!
mostly maths probability questions - a lot of conditional probability, relatively easy in the first round, but you need to think out loud - you need to be really fast
4 rounds in final. The first one is market making of cards. The rest are especially designed games. The interviewer may ask added question along the playing of the game