Asked a lot of brain teasers, confidence in solving them in the alloted time frame, confidence in being correct. Lots of math, interviewer was phone based so quite curt and to the point.
Questions d'entretien [1]
Question 1
If you put a rubix cube in paint and pull it out and split it up and roll the dice, whats the likelihood you roll no paint face up?
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.
J'ai passé un entretien chez Jane Street (Londres, Angleterre)
Entretien
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.