I applied online. The process took 2 months. I interviewed at Jane Street (New York, NY) in Oct 2024
Interview
The interview started of with some probability questions then ended with a short discussion of the role and responsibilities that would be required for the job. Time for questions at the end
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.