I sent in my resume and recieved a reply via email from a recruiter a few weeks later. They scheduled an interview a week or so later with an engineer.
Interview was rather short, asked a few 'tell me about yourself' questions then asked for a function that verified if a tree was a binary tree or not.
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.
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.