Senior Data Scientist

We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled
- and it's creating real impact. We've just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. As a category-defining company, we're shaping what the future of learning looks like at global scale. Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day. Meet the teamAt Preply, we're growing a talented Data Team to empower top-notch decision-making across our organization. Our team collaborates closely with various other chapters
- including product, business, and platform
- leveraging analysis, experimentation, causal inference, and machine learning. You'll be embedded in cross-functional teams, partnering with our MarTech Product Manager, Marketeers, Tech Leads, and the Data Strategy team. Check out our Tech Radar to see the tools and technologies we love using at Preply Own our Marketing Mix Model end to end: build it out, grow it from today's US model to a global, hierarchical setup, and turn it into an automated platform that steers budget allocation. Turn MMM outputs into decisions: partner with performance marketing and finance to fold results into the budget process and guide teams on what they mean for strategy. Steer the testing roadmap that feeds the MMM: use its signals to pick which channels and questions to test, then design and run incrementality tests (geo experiments and other causal inference methods) to measure incremental ROI.
MMM for big budget calls, incrementality-adjusted attribution for channel splits. Drive cross-company initiatives that extend causal inference beyond marketing into our experimentation platform, and into forecasting and risk work with Finance and Product. Build and scale a full-stack self-service platform that puts budget planning and incrementality testing directly in stakeholders' hands, working closely with engineers and marketing. Work with Data Engineering to build scalable pipelines and evolve our ETL as the modeling stack grows (e.g. adopting Databricks).
An AI mindset: you use AI to work faster, automate where it makes sense, and help stakeholders do the same. Hands-on MMM

experience:
you know that getting it right means testing multiple approaches before converging on a robust, defensible model. Experience turning MMM outputs into action, in language marketing and finance can be used. Experimentation expertise: designing and evaluating incrementality tests and A/B experiments. A talent for actionable insights, you design analyses with the decision in mind. Strong Python and SQL skills. Advanced written and verbal English. Previous experience with causal inference techniques (e.g. geo-lift testing, causal impact, synthetic control, difference in differences, etc.)Previous experience with Databricks, Snowflake, Looker;Previous experience with Apache Spark,Knowledge of data orchestration tools (e.g. dbt and Airflow).
Experience in marketplaces or digital businesses, ideally in performance marketing. Why you'll love it at Preply: An open, collaborative, dynamic and diverse culture;A generous monthly allowance for lessons , Learning & Development budget and time off for your self-development;A competitive financial package with equity, leave allowance and health insurance;

We offer
an attractive relocation package to join us in our Preply Barcelona HubAccess to free mental health support platforms;We do it for learners
- For both Preply and tutors, learners are why we do what we do. 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. Growth mindset
- We proactively seek growth opportunities and believe today's best performance becomes tomorrow's starting point. Raise the bar
- We raise our performance standards continuously, alongside each new hire and promotion. Challenge, disagree and commit
- We value open and candid communication, even when we don't fully agree. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company.