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      Jane Street

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      Trading Desk Operations Interview

      Mar 8, 2021
      Anonymous Interview Candidate
      London, England
      No offer
      Neutral experience
      Average interview

      Application

      I applied online. I interviewed at Jane Street (London, England) in Oct 2020

      Interview

      Jane Street contacted me 4 days after I applied for the position. After explaining the position to me, they sent me an Excel task about haircuts and stocks, which involved reading through materials and creating a spreadsheet to calculate the required results. The next stage was a 45-minute phone call where they asked me a series of mathematical and statistical questions. The questions were fairly simple, and if you have a good understanding of mathematics, then they shouldn't be tricky. They then sent over a VBA task for me to complete. I hadn't used VBA before, so this was a slightly longer task. I sent it back after a couple of days of work on it, and they invited me to the final interview. The final interview was a long day of speaking to Jane Street employees. It would have been on-site, but due to the situation, it was all done through online video calls. The day consisted of: 1. A pseudo-code exercise 2. A discussion about stocks, tables, and the data structure of it all 3. A Q&A with a couple of employees where I got to ask questions 4. A discussion about the flow of stocks on the market. They informed me that the order of these segments was altered for me because of scheduling with the employees, and I found that the 2nd segment confused me for the 4th because it introduced concepts that weren't needed for the 4th segment. The last one felt like the most introductory of them all, so I went into it overcomplicating it. I informed them about this. I received an email letting me know I was unsuccessful the next day. Ultimately, I went into the interviews under the impression that no knowledge about stocks or programming was needed (it was a graduate position and I am a graduate), but since I got rejected as the "technical aspects" let me down, I imagine they were actually looking for someone with experience in stocks and in programming. They sent me a free branded gift as they would have done for an actual on-site interview, which was nice, but of course, isn't that useful to me now. The contact I spoke to along the way was nice, and only a couple of the employees during the interview felt condescending (in the 2nd segment). Overall, it was a long application process that I spent ~12 hours on, which I understand is necessary for a position in a significantly successful company. However, I felt the odds were stacked against me when they clearly only wanted someone with a strong foundation to the financial market and programming, instead of just an "exposure" like they ask for, especially for a New Grad position.

      Interview questions [4]

      Question 1

      Q: What is the angle between the hands of a clock at 9:20?
      Answer question

      Question 2

      Q: If Person A builds 1 wall an hour, and Person B build 2 walls an hour, how long does it take for both of them to build 1 wall?
      Answer question

      Question 3

      Q: With 2 fair 8-sided dice, what is the number of combinations where the product of the two numbers results in a square number?
      Answer question

      Question 4

      Q: Interpret dates as numbers (e.g. 10th May 2020 is 10052020). What is the next date where each digit is unique?
      1 Answer
      32

      Other Trading Desk Operations Interview Reviews for Jane Street

      Trade Desk Operations Interview

      Feb 2, 2026
      Anonymous Interview Candidate
      London, England
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Jane Street (London, England)

      Interview

      2 round online interviews. first round is leetcode, 2nd round is online 1to1 zoom interview, asked me brain teaser questions only, did not discuss cv. i f up on quite easy questions. shame on me.

      Interview questions [1]

      Question 1

      how many 5 letter palindromes are there
      Answer question

      Trading Desk Operations Interview

      Jun 14, 2026
      Anonymous Interview Candidate
      London, England
      No offer
      Neutral experience
      Average interview

      Application

      I applied through a recruiter. I interviewed at Jane Street (London, England) in Feb 2026

      Interview

      Applied through a referral. The first step was an initial HackerRank-style assessment that was pretty straightforward and mostly Excel/data-analysis type work. I had to look up values, calculate metrics like profit, and answer practical business/math questions. The second round was with a TDOE and was much more intense. It focused on live problem solving, analytical reasoning, and probability/math concepts. I would recommend being comfortable with expected value, expected wait times, conditional probability, basic optimization, and explaining tradeoffs clearly. The interviewer cared a lot about how I broke down the problem, not just the final answer.

      Interview questions [1]

      Question 1

      One question involved expected wait times for a train that runs every 10 minutes, compared with walking. The train took 5 minutes and walking took 10 minutes. The interviewer kept adding new factors and asked whether the expected wait time or overall travel time would increase or decrease, and why. It was very interactive.
      1 Answer

      Trade Desk Operations Interview

      Jan 8, 2026
      Anonymous Interview Candidate
      No offer
      Positive experience
      Average interview

      Application

      I applied through a recruiter. I interviewed at Jane Street in Dec 2025

      Interview

      Only did the mathematical problem solving interview. No advanced technical knowledge required. Focused mainly on creativity within arithmetic and statistics questions. Focus more on showing your thought process than just solving the question since the interviewer is happy to help if needed.

      Interview questions [1]

      Question 1

      A train arrives at the station every 20 minutes. If you take 5 minutes to run and 10 minutes to walk, what is the expected wait time at the station?
      Answer question

      Jane Street interviews FAQs

      • Trading Desk Operations applicants have rated the interview process at Jane Street with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 42% positive. To compare, the company-average is 63.8% positive. This is according to Glassdoor user ratings.
      • Candidates applying for Trading Desk Operations roles take an average of 19 days to get hired, when considering 72 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 Trading Desk Operations according to 72 Glassdoor interviews include:

        Phone interview:  32%

        Presentation:  18%

        One on one interview:  14%

        Skills test:  12%

        IQ intelligence test:  9%

        Group panel interview:  7%

        Personality test:  3%

        Background check:  3%

        Other:  2%

      • Here are the most commonly searched roles for interview reports -

        1. Software Engineer(51) ;
        2. Quantitative Trader(37) ;
        3. Intern(27) ;
        4. Trader(22) ;
        5. Quantitative Analyst(20) ;
        6. Quantitative Researcher(19) ;
        7. Quantitative Trading Intern(15) ;
        8. Trading Intern(15) ;
        9. Junior Trader(14) ;
        10. Quant Trader Intern(13) ;
        11. Analyst(11) ;
        12. Internship(11) ;
        13. Quant Trading Intern(10) ;
        14. Customer Service Representative(7) ;
        15. SWE Intern(7) .


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