Senior Data Scientist - Insights (Paid Marketing Optimization)

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. So far, 90,000 tutors have delivered over 20 million lessons to learners in more than 175 countries. Every Preply lesson sparks change, fuels ambition, and drives progress that matters.

Meet the team!

At 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!

What you’ll be doing:  

• Collaborate with performance marketing teams in coming up with data solutions to support the optimization of marketing campaigns, budgets and results; 
• Use recommendation systems and clustering to uncover the most effective combinations of search terms, keywords, ad copies, and landing pages that maximize effectiveness of our paid search channel;
• Scale new channels and improve targeting and bidding strategies by using regression models to assign predictive weights to funnel events;
• Lead the rollout of LTV models and use early insights to guide marketing investments, product decisions, and uncover high-leverage opportunities across the business - including CRM, Customer Support, Refer-a-Friend, and more - while proactively sharing learnings to inform cross-functional strategy and prioritization;
• Design and analyze A/B tests to measure marketing effectiveness, applying advanced methods like causal inference and geo-lift testing to quantify incremental ROI;
• Work closely with the Data Engineering team in the creation of scalable data pipelines while guaranteeing an optimal evolution of our ETL processes, as well on the adoption of new tools and frameworks;
• Contribute to cross-company initiatives in alignment with our data organization’s vision;
• Support proactively the application of marketing mix, attribution and predictive models in performance marketing channels.

What you need to succeed:

• Solid experience as a Data Scientist delivering business insights and building data products;
• Previous experience developing and deploying machine learning models;  
• Experience with experimentation (design and evaluation of A/B tests);
• Experience working in Marketplaces and/or digital businesses environments, in the context of performance marketing;
• Strong coding skills in SQL and Python; 
• Creative mindset and proactive attitude towards the creation and evaluation of new solutions;
• Strong curiosity, problem solving and problem finding skills;
• Advanced written and verbal communication skills in English.

Nice to have:

• Knowledge of bidding, incrementality, attribution or MMM;
• Previous experience with causal inference techniques (e.g. 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).

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.

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