I applied online. The process took 2 weeks. I interviewed at Jane Street (London, England) in Nov 2015
Interview
I applied at Jane Street Capital for a position in London (Trading). The process took 2 weeks. I received my first telephone interview with one of the traders working at Jane Street.
Interview questions [1]
Question 1
Basic Maths, probability, a brain teaser.
suppose you are standing at 1/3 the length of a bridge and you hear a train coming from backwards. You have just enough time to run back and get off the bridge before the train hits you. You also have just enough time if you decide to run forwards. What is the relative speed between you and the train.
They tend to examine the logical thinkers that can communicate clearly and concisely, and some problem-solving exercises intended to explore how you gather and apply new information, very different from other tech companies' interviews.
Initial application and online assessment. Had a first round behavioral interview where they asked me about myself, my experiences, and a couple of brain teasers. The interviewer was very nice.
Phone interviews (at least 3) - questions were of mixed difficulty (some pretty hard) but the interviewers were friendly and they gave helpful hints. Kind of fun - review probability and game-type questions.