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.
Easy interview
Application
I applied online. I interviewed at Jane Street
Interview
You could apply through the internet anytime for all the positions shown in their homepage.
For trader or quantitative research intern positions, there should be about six rounds of interviews which would probably focus on technical questions.
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.
I applied online. I interviewed at Jane Street (New York, NY)
Interview
I first applied in google form answer basic questions about me and with that I had to upload my resume and transcript. I don't remember after how long I got an interview time to choose and did my first round of interview.