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    Twitter Data Scientist Interview Questions

    Updated Aug 28, 2018
    20 Interview Reviews

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    Helpful (5)  

    Data Scientist Interview

    Anonymous Interview Candidate
    No Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through an employee referral. The process took 6 weeks. I interviewed at Twitter.

    Interview

    I got contacted by a recruiter and had 4 interview rounds. 1 phone screen, 2 video technical interview (ML Theory + Coding in SQL/Python/R, you decide the language), then an on-site interview round with 5 interviews of 45 minutes each (2 interviews with Data Scientists, lunch with another Data Scientist, an interview with a project manager and an interview with the Data Science Manager).

    Everyone was very kind and very ethusiastic about their job, asked interesting and challenging questions and seemed very smart and capable.

    As the Data Science position was for the product department, I had to face a lot of experimentation questions (A/B tests, metrics development...) instead of machine learning algorithms, which I imagine would be required for the Forecast and Modelling area, for example.

    Interview Questions

    • What would you change in Twitter app?
      How would you test if the proposed change is effective or not?   Answer Question

    Other Interview Reviews for Twitter

    1. Helpful (1)  

      Data Scientist Interview

      Anonymous Employee
      Accepted Offer
      Positive Experience
      Average Interview

      Application

      I applied through a recruiter. The process took 3 weeks. I interviewed at Twitter in February 2018.

      Interview

      Two video interviews and a coding test, then three video interviews. Five of the six interviews were technical. All of the interviewers were knowledgeable and friendly, but they changed the schedule on the fly a lot and the different interviewers didn't seem to know what I'd already been asked/where I was in the process.

      Interview Questions

      • Some basic SQL questions and some intermediate algorithms questions, along with a lot of verbal data science questions in the interviews.   Answer Question

    2. Helpful (2)  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Negative Experience
      Average Interview

      Application

      I applied through a recruiter. The process took 1+ week. I interviewed at Twitter in September 2016.

      Interview

      I was supposed to have a 45 minute technical coding screen but the guy was booked too tightly and only had 20 minutes (told me this at the beginning of the call). So instead of a technical coding screen it turned into a series of random business case style interview questions. Overall a pretty terrible - no wonder Twitter is plummeting as a company

      Interview Questions

      3. Join the Twitter team
      See Our Latest Jobs

    3.  

      Data Scientist Interview

      Anonymous Interview Candidate in San Jose, CA
      No Offer
      Negative Experience
      Average Interview

      Application

      I applied through a recruiter. The process took a week. I interviewed at Twitter (San Jose, CA) in February 2012.

      Interview

      Received an invite via linkedIn from an insider recruiter in Twitter. One phone interview. Then coding challenge at codility.com. The code challenge has two problems. Both are fairly simple.

      Then I decided not to purse because I got another offer.

    4. Helpful (1)  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Negative Experience
      Difficult Interview

      Application

      I applied online. The process took a week. I interviewed at Twitter.

      Interview

      HR set me up with technical interview, no HR screening. The interview was very bad, the guy was super inexperienced. I had really hard time understanding his question, and the coding part is even worse. I was interrupted every 1 min, couldn't code at all as this person interrupted me with something when I started write the code. Also he doesn't know the language I was coding.

      Interview Questions

    5.  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Neutral Experience
      Difficult Interview

      Application

      I applied online. The process took 3 weeks. I interviewed at Twitter in November 2017.

      Interview

      3 weeks after I applied, I received a link to a coding challenge. This link is set automatically so you don't have anyone to talk to in case you have questions. You have one week to complete the challenge but it's supposed to be done in 90 minutes if you want to get through.

      Interview Questions

      • Three exercises. One involving SQL, another one involving dynamic programming and one last involving tries.   1 Answer

    6.  

      Data Scientist Interview

      Anonymous Interview Candidate in Boston, MA
      No Offer
      Negative Experience
      Average Interview

      Application

      I applied online. The process took 4+ weeks. I interviewed at Twitter (Boston, MA) in September 2017.

      Interview

      I applied online. The process took about a month. 2 phone interviews with HR managers, test and personal interview with team members (It took about 3 hours). Free lunch was served and people were friendly.

      Interview Questions

    7. Helpful (3)  

      Data Scientist Interview

      Anonymous Employee
      Accepted Offer
      Positive Experience
      Average Interview

      Application

      I applied through college or university. The process took 2+ months. I interviewed at Twitter in February 2015.

      Interview

      Firstly applied for Software Engineer Intern because they said they will not have Data Scientist Intern this year.
      1. Online code challenge (easy).
      2. 45-minute on-campus interview about previous CS projects, a white-board coding problem.
      Then they reassigned me to the "non-existing" Data Scientist Intern application after this round.
      3. 45-minute phone interview about a dynamical programming question, plus some brain storms about user modeling.
      4. 3 45-minute on-site interviews of a composition of coding, stats, machine learning, algorithm and previous experience.
      5. Got the offer.

      Interview Questions

    8.  

      Data Scientist Interview

      Anonymous Interview Candidate
      No Offer
      Negative Experience
      Average Interview

      Application

      I applied online. The process took 2+ months. I interviewed at Twitter in March 2015.

      Interview

      It was a fair interview process with multiple phone screens, case study and on-site. Team was very high-caliber and had a diverse background. Phone screens and case study involved problems related to the role. Disappointed however with the recruiter and the company in that they didn't have the courtesy of responding to me with a decision after the interview at all.

      Interview Questions

    9. Helpful (5)  

      Data Scientist Interview

      Anonymous Interview Candidate in San Francisco, CA
      No Offer
      Neutral Experience
      Difficult Interview

      Application

      I applied through an employee referral. The process took 3 weeks. I interviewed at Twitter (San Francisco, CA) in September 2015.

      Interview

      phone interview with hiring manager, got onsite invitation the same day
      onsite, meet with 6 engineers. one's data scientist, all others are software engineer.
      algorithm question mostly, some machine learning question, math/application case.
      also, one system design question. how large scale machine learning work on distributed system

      positive feedback, went through hiring committee. However, no offer yet. They're cutting jobs, so bad timing!

      Interview Questions

      • algorithm(50%), machine learning(30%), system design(20%)   Answer Question
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