Jane Street

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Jane Street Junior Trader Interview Questions

Updated Nov 18, 2014
Updated Nov 18, 2014
8 Interview Reviews

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Junior Trader Interview

Anonymous Interview Candidate
Anonymous Interview Candidate
Interview Details

I applied for a trader position off my college’s career site. They were prompt in replying. I received two phone interviews. The first was easy probability questions, but the second had more difficult questions. I did not get a final round interview. The younger guy I interviewed with was friendly but the older guy was really harsh/dismissive when I got something wrong.

No Offer

Other Interview Reviews for Jane Street

  1.  

    Junior Trader Interview

    Anonymous Interview Candidate
    Anonymous Interview Candidate
    Application Details

    I applied through college or university. The process took 2 weeksinterviewed at Jane Street in January 2014.

    Interview Details

    Contact was made by e-mail to setup a phone interview. Interview was extremely quantitative, but relatively obscure. Main question was about a complex probability game that the interviewer expected you to calculate mentally. A few more obscure technical questions (as a person coming from a math background) and the interview was over. Process seemed self-defeating as a very small number of people would have the intuition to quickly do a problem like that in their head, but that says little about skill.

    Interview Questions
    • As mentioned above, a probability game between two players was given and it involved a complex card game requiring combinatorics.   Answer Question
    No Offer
    Neutral Experience
    Difficult Interview
  2. 1 person found this helpful  

    Junior Trader Interview

    Anonymous Interview Candidate in New York, NY
    Anonymous Interview Candidate in New York, NY
    Application Details

    I applied online. The process took 3 weeksinterviewed at Jane Street in January 2012.

    Interview Details

    applied online, the HR contacted me 2 weeks after my application and I got the first interview the week after.
    Answer after each interview were given three days after. and scheduled for the week after. The process took 3 weeks for me since I have been rejected after the thirs interview.
    The HR told me that in total there are 4 phone interview and one final round in their office of NY.

    Interview Questions
    • During the third interview : imagine an infinite chess board. If the horse from 1 case, in how many cases can he possibly ends after 10 moves. You actually don't have to give a number but a 95% confidence interval.
      pen and paper allowed
        View Answers (12)
    • during the second interview : give a 95% confidence interval of the number of riders that have taken Tokyo's metro since its construction!!
      if someone takes the metro two time a days he would count 2*number of day * ....
      No paper, no pen and not internet allowed
        View Answer
    No Offer
    Positive Experience
    Difficult Interview
  3.  

    Junior Trader Interview

    Anonymous Interview Candidate
    Anonymous Interview Candidate
    Application Details

    I applied online – interviewed at Jane Street.

    Interview Details

    i applied online and heard from them after a week or two inviting me to a phone interview. There are 4 questions. Probability. first three are easy. last one is hard. they also asked you to rate your confidence level on your answer to each question.

    Interview Questions
    • a train is approaching the bridge. you are at 1/4 position of the bridge. running both ways can rescue you. what is the speed ratio of you and the train.   Answer Question
    No Offer
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  5.  

    Junior Trader Interview

    Anonymous Interview Candidate
    Anonymous Interview Candidate
    Interview Details

    Interview process was multiple rounds, 4 over the phone, finally flied me to London for final round interview. Overall it went quite smoothly, though there was some minor hiccups here and there. I guess they don't particularly mind minor mistakes; they focus on your thought process i.e. how you deconstruct a problem and use some form of insight to achieve an elegant solution

    Interview Questions
    No Offer
  6.  

    Junior Trader Interview

    Anonymous Interview Candidate
    Anonymous Interview Candidate
    Application Details

    I applied online. The process took 2 weeksinterviewed at Jane Street in May 2012.

    Interview Details

    first round questions are easy, mental math, probability,
    The interviewer was very patient and nice. My phone signal was terrible so he had to call me several times.

    Interview Questions
    • I have a number in mind. The product of each digit of the number is 96, no digit 1 in this number. What's the biggest and the smallest number I could think of?   View Answer
    No Offer
    Neutral Experience
    Average Interview
  7. 1 person found this helpful  

    Junior Trader Interview

    Anonymous Interview Candidate
    Anonymous Interview Candidate
    Application Details

    I applied through college or university. The process took 2 weeksinterviewed at Jane Street in November 2011.

    Interview Details

    Applied through Stanford's career website with only my resume and got an on Campus Interview. The first interview was positive. Questions were not too difficult but I was really nervous. Passed the on Campus interview and got a phone interview two days later. I was very nervous (never had a phone interview) and could barely hear the the interviewer. Did not pass this one :(

    Interview Questions
    • If the chance of rain on Saturday is 70% and on Sunday is 60%, what is the chance of it raining this weekend?   View Answers (3)
    No Offer
    Neutral Experience
    Average Interview
  8.  

    Junior Trader Interview

    Anonymous Interview Candidate
    Anonymous Interview Candidate
    Application Details

    The process took 2+ monthsinterviewed at Jane Street in October 2011.

    Interview Details

    Three rounds of phone interviews are done so far, and the fourth one is on tomorrow. A lot of frequently asked questions appeared. However the consultancy-style guestimate questions are yet to come up. Lots of betting and market-making questions following each probability/logic problem, which makes me guess this betting process are as important a part as solving the actual problems in their evaluation.

    Interview Questions
    • 3000 Apples to be transported from city A to city B, between which the distance is 1000 miles. When there is apple on the truck, one apple disappears as every mile driven. Assume unlimited gasoline, how many apples maximum can be transported to city B? Given your answer is x, what market would you make on a lottery: you win 10 dollars if your answer is correct, otherwise 0 dollar. (All calculation must be done without pen and paper)   Answer Question
    No Offer
    Positive Experience
    Difficult Interview

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