I applied through other source. The process took 1 day. I interviewed at Jane Street (New York, NY) in Jan 2011
Interview
I had a 30 minutes interview. For the first 20 minutes I was asked to solve mental math problems and brain teasers. For the last 10 minutes or so I was allowed to ask questions about the company.
Some questions:
1. What is the sum of all the odd numbers form 1 to 100
2. In an urn you have red and blue balls (same number of balls in each of the two colors). You extract 3 balls what is the probability that the number of balls you have extracted is odd. Now you extract 10 balls, what is the probability that the number of balls you have extracted is odd?
3. There are 30 blue and 30 red balls and two urns. You play a game. Your opponent has the right to arrange the balls in the two urns as he pleases, without telling you what he did. You then must draw a ball from an urn of your choice. You win $10 if you draw a blue ball, otherwise you get $0. How much would you be willing to pay to play this game?
Interview questions [2]
Question 1
2. In an urn you have red and blue balls (same number of balls in each of the two colors). You extract 3 balls what is the probability that the number of balls you have extracted is odd. Now you extract 10 balls, what is the probability that the number of balls you have extracted is odd?
3. There are 30 blue and 30 red balls and two urns. You play a game. Your opponent has the right to arrange the balls in the two urns as he pleases, without telling you what he did. You then must draw a ball from an urn of your choice. You win $10 if you draw a blue ball, otherwise you get $0. How much would you be willing to pay to play this game?
A difficult interview. Did not encounter question in Leetcode/my own practise, had to think outside the box to solve it. Interviewer got straight to the point, no behavioral questions, so be prepared.
Interview questions [1]
Question 1
Solve this question, walk me through your thinking.
Some brain teasers and probability problems that are variations of commonly seen quant interview problems. Require smart reacting rather than very high level maths or finance knowledge. Friendly interviewers, active involvement.
The interview process involved multiple rounds, starting with a phone screen covering probability, brain teasers, and market-related questions. This was followed by a technical assessment focused on programming and mathematical problem-solving. The final round included onsite interviews with case studies, logic puzzles, and discussions on trading strategies. The process emphasized clear thinking, structured problem-solving, and strong quantitative skills.
Interview questions [1]
Question 1
You are given two identical eggs and a 100-story building. Your task is to determine the highest floor from which you can drop an egg without it breaking.
Quantitative Analyst applicants have rated the interview process at Jane Street with 3.6 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 48% positive. To compare, the company-average is 63.8% positive. This is according to Glassdoor user ratings.
Candidates applying for Quantitative Analyst roles take an average of 10 days to get hired, when considering 28 user submitted interviews for this role. To compare, the hiring process at Jane Street overall takes an average of 17 days.
Common stages of the interview process at Jane Street as a Quantitative Analyst according to 28 Glassdoor interviews include:
Phone interview: 31%
One on one interview: 20%
Skills test: 17%
Personality test: 9%
IQ intelligence test: 9%
Other: 6%
Drug test: 3%
Presentation: 3%
Background check: 3%
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