Portfolio Company Jobs


Data Scientist - Insights (Ranking)



Data Science
Barcelona, Spain
Posted on Monday, May 13, 2024

At Preply, we are unlocking human potential through learning.

We believe learning with a great tutor is life-changing. That’s why we match online tutors from across the globe with learners and empower them to create live language classes with AI-powered tools and learning materials. This is how we deliver progress, create engagement and keep our global community of learners motivated. So far, over 32,000 tutors have given more than 15 million lessons to learners from over 175 countries.

Meet the team!

The ranking team at Preply owns one of the key touchpoints for our learners, developing the tutor ranking algorithms that power our search page. You will work with a cross-functional product team with expertise in data science, machine learning and MLOps to help guide the direction and understand the impact of our production models, helping our learners find the best tutor possible.

What you’ll be doing:

  • Diving deep into the behavior of our users to identify new opportunities;
  • Experiment design and pre and post experiment analysis, to dig into what experiments are telling us and use these learnings to help shape future direction;
  • Exploring, testing and productionising new features used in our core ML algorithms;
  • Problem sizing and estimating the impact of new initiatives;
  • Help refine product initiatives into lean, experiment-led technical implementations;
  • Participating in the definition of engagement metrics and key performance indicators;
  • Partnering with ML scientists and engineers to test new approaches and build new data assets.

What you need to succeed:

  • Strong background in experimentation and causal inference;
  • Ideally 5+ years’ experience as a Data Analyst or Data Scientist working in search, ranking or recommender systems;
  • Strong Python and SQL experience;
  • Bachelor's degree in a relevant technical field;
  • Knowledge of quantitative fields (statistics, mathematics, etc.);
  • Ability to apply statistical techniques to derive meaningful insights and make data-driven decisions;
  • Exhibiting strong curiosity, problem-solving skills, and the ability to identify and address underlying problems;
  • Emphasizing a creative mindset and proactively engaging in the formation and evaluation of new hypotheses;
  • Possessing strong written and verbal communication skills in English.

Nice to have:

  • Experience working with ML products and engineers
  • Experience with modern MLOps tooling, such as MLFlow
  • Experience with Spark

Why you’ll love it at Preply

  • An open, collaborative, dynamic and diverse culture;
  • A generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for your self-development;
  • A competitive financial package with equity, leave allowance and health insurance;
  • Not in Barcelona? We offer an attractive relocation package to join us in our Preply Barcelona Hub
  • Access to free mental health support platforms;
  • Access to Gympass-partnered wellness and gym centers throughout Spain to promote and support well-being and physical health;
  • The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!).

Our Principles

  • Care to change the world - We are passionate about our work and care deeply about its impact to be life changing.
  • We do it for learners - For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
  • Keep perfecting - To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.
  • Now is the time - In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.
  • Disciplined execution - What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.
  • Dive deep - We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.
  • Growth mindset - We proactively seek growth opportunities and believe today's best performance becomes tomorrow's starting point. We humbly embrace feedback and learn from setbacks.
  • Raise the bar - We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
  • Challenge, disagree and commit - We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.
  • One Preply - We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other's progress.

Diversity, Equity, and Inclusion

Preply is committed to creating a diverse and inclusive environment where people from all backgrounds can thrive. Different opinions and viewpoints are key ingredients in our success as a multicultural Ed-Tech company.

Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status. Together, we are The World Class.