I applied online. The process took 3 weeks. I interviewed at Jane Street (London, England) in Jan 2018
Interview
As I know there are 3 phone interviews and one on-site. I got rejected after the third phone interview. They were only interested in my problem solving abilities, I liked that. At the end of the phone conversations I had the opportunity to ask questions.
On the last interview I got this question:
Given cards numbered from 1 to 9 all flipped up and two dies. We throw the dies, if the sum of the numbers is greater than 9, we throw again. If the sum is less or equal than 9 we have the following options:
-flip down the card with the sum as a number on it or
-flip down two cards, showing each thrown number.
So if we throw 3 and 4 we can choose to flip down 7 or both 3 and 4.
If for example 7 is already flipped then we must flip 3 or 4. Similarly if one of the cards 3 or 4 is flipped then we must choose the sum. If we can't flip down anything the game ends and our score is the number of flipped cards. What is the best strategy?
Very fun process, need to explain your thinking clearly and cleanly, interviewers were nice for all interviews as well. I would recommend working on math and probability questions prior to doing the interview,
The process began with serveral online tests for maths and logic. They gave a personal interview to get to know the candidate better and evaluate fit for the company/role, then held a technical interview covering maths and logic problems.
Fun and filled with unexpected questions. The questions rely on fast thinking and fast calculations, and sometimes intuition because there is no sufficient time for me to work through the whole problem.
Jane Street interviews FAQs
Quantitative Researcher applicants have rated the interview process at Jane Street with 3.5 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 68% positive. To compare, the company-average is 63.8% positive. This is according to Glassdoor user ratings.
Candidates applying for Quantitative Researcher roles take an average of 18 days to get hired, when considering 104 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 Researcher according to 104 Glassdoor interviews include:
Phone interview: 50%
Skills test: 13%
One on one interview: 10%
IQ intelligence test: 9%
Presentation: 6%
Other: 5%
Background check: 4%
Personality test: 3%
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