Jane Street Interview Questions | Glassdoor

Jane Street Interview Questions

Updated Feb 24, 2017
802 Interview Reviews

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  1.  

    Trading Interview

    Anonymous Interview Candidate in New York, NY
    No Offer
    Neutral Experience
    Average Interview

    Application

    I applied online. The process took 2 weeks. I interviewed at Jane Street (New York, NY) in December 2016.

    Interview

    I applied through their website and was contacted within the week. They then offered my an alternative to the "normal" interview process with an online test. The online test was with HackerRank, and comprised of many expected value and combinatorics problems.

    Interview Questions

    • Lots of questions about taking things out of bags, expected value, prime number ordering, etc.   Answer Question
  2.  

    Junior Trader Interview

    Anonymous Interview Candidate in New York, NY
    No Offer
    Positive Experience
    Difficult Interview

    Application

    The process took 1 day. I interviewed at Jane Street (New York, NY) in December 2016.

    Interview

    First round is a phone interview. A trader at the firm will ask four or five brain-teaser questions. Interview took about an hour. The trader was very kind and patient and gave suggestions when I was stuck on a question. It seemed that the interviewer was testing how I responded to not immediately knowing the answer or the process.

    Interview Questions

  3. Helpful (2)  

    Trading Interview

    Anonymous Interview Candidate
    No Offer
    Positive Experience
    Average Interview

    Application

    I applied online. I interviewed at Jane Street.

    Interview

    Applied online, received an email and scheduled a phone interview. The phone interview took 30min. The interview was mainly about mental math and probability questions. It got harder and harder through the process. The trader that interviewed me was very nice. When I got stuck, he would give hints. This was the first round interview, I am still waiting for the feedback.

    Interview Questions

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  5.  

    Trading Summer Interview

    Anonymous Interview Candidate in Chicago, IL
    No Offer
    Positive Experience
    Easy Interview

    Application

    I applied through college or university. The process took 1 day. I interviewed at Jane Street (Chicago, IL) in November 2016.

    Interview

    1 hour earlier phone call. The questions are all about the optimal bid for a bid problem. The interviewer cares more about the intuition about your result instead of the mathematical derivations. 3 more rounds may come around in the next few weeks. I think I have pretty well prepared, but I still got nervous mostly because this is my first time to do phone interview for intern/job.

    Interview Questions

    • Assume x dollar(uniformly from(0,1000)) is put into a blackbox. Then you bid on the amount. If x>bid, you get return 1.5x-bid; otherwies you get nothing. The question is what is the optimal bid. Several other different circumstances are also been asked.   1 Answer
  6.  

    Senior Voice Engineer Interview

    Anonymous Interview Candidate in New York, NY
    No Offer
    Positive Experience
    Easy Interview

    Application

    I applied through a recruiter. The process took 3 weeks. I interviewed at Jane Street (New York, NY) in November 2016.

    Interview

    I was contacted by a recruiter for a this senior level Voice opportunity. The process took several weeks in scheduling phone screens and a final face to face interview. Very easy technical questions with no difficulty, but I think based their experience with a certain upgrade they may have disagreed with my technical response. I've completed more than 500 difficult changes with no down time, so giving my answer may not have been their correct answer as they viewed.

    Interview Questions

    • The interview process with Jane Street for this senior level technical opportunity is straight forward. The phone screens are directly to the point with very to little small talk.

      The final interview are multiple face to face interviews that include details white boarding of technical questions asking you to explain yourself in great detail.

      My experience as a Senior Network Engineer I gave my answers based on real world experience and not incorrect documentation for a perfect world scenario.

      All in all it was a good experience, I just felt they look for a certain type of candidate with academic accomplishments from a more advanced ivory league school than I attended at NYU. I would advise anyone interviewing for Jane Street is to be yourself and not someone you think they are looking for.  
      Answer Question
  7.  

    Business Development Interview

    Anonymous Interview Candidate
    No Offer
    Negative Experience
    Easy Interview

    Application

    I applied online. The process took a week. I interviewed at Jane Street in November 2016.

    Interview

    I applied for the software engineering intern position online, and received an email asking if I would like to be considered for a business development internship, to which I replied yes. The recruiter then sent me an easy Excel VBA exercise, which to my knowledge I complete fully and in a timely manner. I then received a message two days later saying they weren't moving forward.

    Interview Questions

  8.  

    Quantitative Researcher Interview

    Anonymous Interview Candidate in New York, NY
    No Offer
    Positive Experience
    Difficult Interview

    Application

    I applied online. I interviewed at Jane Street (New York, NY) in November 2016.

    Interview

    45 mins phone interview. Quite difficult. All questions are about the probability. I do think that I failed at the very beginning. He said that he would contact me very soon. But I didn't hear from them for a quite long time. Feel a little sad about the experience.

    Interview Questions

    • Flip the coins, the expected time to get HHT   2 Answers
  9.  

    Software Engineer Interview

    Anonymous Interview Candidate in Pittsburgh, PA
    No Offer
    Neutral Experience
    Easy Interview

    Application

    I applied through college or university. The process took 7+ weeks. I interviewed at Jane Street (Pittsburgh, PA) in November 2016.

    Interview

    Placed in stand-by interview. Waited a month, and got a phone call for an hour.
    Nothing better to add to the pants of the process, but you had to code quickly and fast.
    Be able to be good at what you're good at, and be confident.
    Know Python, Java, how to recurse, how to talk to yourself and the most important thing is to be able to write safe and sound code. It doesn't matter if you finish quickly if it's buggy, because it's going to catch his attention and f you up even more later on when he actually picks it out and asks you to fix it.

    Interview Questions

    • Given a board with directions to follow in every block, how would you tell if you can ever reach point "x" or not.   2 Answers
  10.  

    Internship Interview

    Anonymous Interview Candidate in New York, NY
    Declined Offer
    Positive Experience
    Average Interview

    Application

    I applied online. The process took 2 weeks. I interviewed at Jane Street (New York, NY) in November 2016.

    Interview

    They quickly responded after I submitted my application (about a week after) and booked an interview.
    Just one technical question which got "upgraded" multiple times. Whole interview lasted about an hour.

  11.  

    Trader Interview

    Anonymous Interview Candidate
    No Offer
    Neutral Experience
    Difficult Interview

    Application

    I applied through an employee referral. The process took 2 weeks. I interviewed at Jane Street in November 2016.

    Interview

    Received a quantitative interview via a referral from a colleague. A recruiter reached out within a week and scheduled an interview for me with a trader. We went through a series of applied probability questions over the course of fifty minutes. The entire process was pretty reasonable, but I had not had time to brush up on probability tricks so I struggled.

    Interview Questions

    • What is the probability that a series of fair coin flips will have an even number of heads? What if the coins are not all fair (though a subset are)?   1 Answer

See What Jane Street Employees Are Saying

4 people found this helpful

Star Star Star Star Star     Current Anonymous Employee

Pros: “- Smart, nice people - Great culture and significantly less bureaucracy compared to other firms I have worked for - Growing company where you are given the opportunity to take on...”“- Smart, nice people - Great culture and significantly less bureaucracy compared to other firms I have worked for - Growing company where you are given the opportunity to take on responsibility early on - Firm is willing to explore new ideas” – Full Review

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