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 general scale, and building something that truly matters for millions of people, every day.
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!
This role requires a real interest in the marketing bidding universe and the ability to work with a lot of ambiguity. You will go deep into each channel, understand its bidding and optimization behavior, and derive data driven solutions to increase each channel's ROI through bidding, audience and creative optimization. Marketing brings the business questions, you define the success metrics and the modeling approach to answer them.



A lot of this is untapped territory and there is nothing off the shelf to buy, so inventing the approach and convincing your stakeholders of it is a big part of the job.
Design our Creative Analytics framework (creative performance modeling) - Own, design and develop our Creative Analytics Framework. Longer term, build models that separate what a creative actually causes from what the algorithm’s delivery decides for it, so we can predict the incremental drivers of creative efficiency.
Predict too early and the signal is noisy, too late and the algorithm doesn’t get enough data to learn from.
Audience optimization (uplift modeling) - Create customer uplift models to identify incremental value and build audiences that improve marketing efficiency. Tell the networks who to look for and who to skip, and feed that back as prospecting seeds, remarketing audiences and exclusion lists.
Work closely with the Data Engineering and Applied AI team on scalable data pipelines, the evolution of our ETL processes, and the adoption of new tools and frameworks.
Python, SQL and a distributed framework like Spark; Experience with marketing or attribution data, and a working understanding of how bidding platforms consume the signal you send them. Separating what a channel drives from what it takes credit for,



and designing the test that settles it when the platform controls delivery.
The instinct to turn a business hypothesis into something testable, and the honesty to say when the data can't answer it.
Comfort working across teams you don't control. This role runs on close collaboration with Applied AI, marketing measurement, MarTech and tracking, and CRM.
You might come from marketing DS, ads ML, recommender systems or any applied ML role where your model’s output fed another algorithm.
Why you’ll love it at Preply:
com, 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 Hub
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.

📌 Staff Data Scientist - Paid Marketing Optimization (Barcelona)
🏢 Preply
📍 Barcelona