I applied online. The process took 3 months. I interviewed at Jane Street (London, England) in Dec 2021
Interview
An hour london technical interview, presented with problems and solved them with hints. Used python as my language. Very nice interviewers, I felt like they allowed me to show all my abilities and talking through problems.
Interview questions [1]
Question 1
Described functions and got me to implement them which were eventually used to make a function with produces a git diff like output between two strings.
it was nice. He was very kind and talkative. he explained the problem quite clearly. It was good experience. Will apply again definitely. Jane street is very good. You guys shud apply too
Fast and efficient, everyone is friendly.
The interview was fully techinical, no background or behavioral questions for me. The style is very collaborative — asking for hint in a proper way would be considered a plus I guess.
First round was online, one round of 1hr class design questions.
Given a class interface, you need to implement it with another given class interface. My question is like a general tree question.
You kinda need to go far enough to get to next round, so if you're too slow or have trouble solving easier parts, you cannot make it. I didn't move on.