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Data Scientist Intern - Search and Relevance in Barcelona


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Job Description

letgo's the largest and fastest growing app to buy and sell locally. With over 75M downloads and hundreds of millions of listings to date, letgo’s been named among the “Hottest Startups” by Wired and “Best Apps” by Google, and it’s the second fastest growing app in America since its 2015 launch. Business Insider calls letgo “the go-to app for selling your stuff” and it’s been featured by The New York Times, The Today Show, USA Today, The Verge, Fast Company, The Wall Street Journal, Fortune and hundreds of others worldwide. Already among the most popular apps in America, letgo’s marketplace is filled with everything from electronics and cars to clothing and furniture. Listing something on letgo is as simple as taking a photo thanks to its advanced technology. It’s the only app of its kind that can automatically title and categorize an item using artificial intelligence. Plus, users can easily browse local listings, chat instantly in the app, and view each other’s profiles, ratings and reviews.

Based in our New York and Barcelona offices, our team of over 165 represents more than 20 nationalities. Fueled by our diverse expertise, letgo’s goal is to build the largest marketplace of its kind in the world. We’re looking for people who are as passionate as we are about creating something our users love and - just as importantly - who are excited by the challenge.

The Data Scientist Intern is responsible for designing and driving a project to improve our search engine. Potential internship projects include: developing relevance ranking models, designing and evaluating new relevance metrics, learning representations for our products (images and text) and our users, query understanding, product description enrichment, etc.

We’ve built a company for people who want to do impactful work, surrounded by great people. We have a well-defined, mature culture — and we’re always making it better.

Your challenge:

  •   Perform analyses to identify improvement opportunities of our search engine
  •   Apply machine learning, NLP and deep learning methods to our massive data sets
  •   Implement prototypes to show the potential value of the project
  •   Implement the solution at scale
  •   Communicate the insights to R&D and Product teams

To get there, you’ll need:

  •   PhD. or advanced MSc. student in Computer Science, Mathematics, Statistics or related fields
  •   Strong software development skills (preferably Python, Java or Scala)
  •   Strong quantitative skills (statistics, probability, machine learning) as well as knowledge of algorithms/data structures

Nice to have:

  •   Strong knowledge of the theory and practice of controlled experiments
  •   Experience with recommender systems
  •   Knowledge of NLP and Computer Vision tools and algorithms
  •   Familiarity with building and deploying data pipelines and services in AWS

letgo perks:

  •      Paid internship position in Barcelona
  •      In-house physical therapy
  •      Language classes
  •      Candy bar (fruit, snacks, drinks, coffee, etc.)
  •      Activities, team building, etc.
  •      Exceptional work environment
  •      Opportunity to work for a fast growing, mobile start up company

Please send us a note explaining why you are interested in this position, attaching a copy of your CV and links to relevant work (publications, github repositories, etc).


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