ppAt Macadam, we've built an app that rewards people for walking. With over 15 million users worldwide, we help individuals turn their daily steps into positive habits for health, wellbeing, and sustainability. /ppOur team is growing fast, and our ambitions are integral. We operate at the intersection of health, gamification, and technology, and we're building a world-class data team to support this growth. /ppIf you're passionate about using data and machine learning to build products that improve lives at scale, we'd love to meet you. /ph3THE ROLE /h3pWe are looking for a Senior Data Scientist to help shape Macadam's product and growth strategy through machine learning, experimentation, and advanced analytics. /ppYou will work on high-impact topics such as personalization, user engagement, retention, monetization, fraud prevention, and reward economy optimization. This is a hands-on senior role with ownership from problem definition through deployment and impact measurement. /ppYou will partner closely with Product, Growth, Marketing, Engineering, and Analytics teams to build data-driven solutions used by millions of users. /ph3This role is based in Barcelona. We're looking for candidates who are already living in the city or ready to relocate. /h3h3RESPONSIBILITIES /h3ulliIdentify and lead data science opportunities that improve growth, engagement, retention, revenue, and user experience /liliBuild machine learning models for personalization, recommendations, user behavior prediction, segmentation, and forecasting /liliDevelop solutions supporting churn prevention, lifetime value optimization, fraud detection,



and Macadam's reward economy /liliDesign and analyze experiments using A/B testing, causal inference, and other advanced statistical methods /liliTake models from initial exploration to production, working closely with Data and Engineering teams /liliDefine clear success metrics and evaluate solutions based on measurable product and business impact /liliCommunicate findings and recommendations clearly to technical and non-technical stakeholders /liliContribute to Macadam's data science roadmap, standards, and best practices /li /ulh3WHAT YOU'LL BRING /h3ulli5+ years of experience in Data Science, Machine Learning, Applied Science, or a similar role /liliStrong proficiency in Python and SQL /liliExperience using BigQuery, GCP, dbt, and product analytics tools such as Mixpanel or Firebase Analytics /liliExperience developing, deploying, and evaluating machine learning models /liliFamiliarity with data pipelines and production machine learning workflows /liliStrong knowledge of statistical modeling, experimentation, and model evaluation /liliExperience working with large behavioral, transactional, or product datasets /liliStrong product and business mindset,



with a focus on measurable outcomes /liliExcellent communication and cross-functional collaboration skills /li /ulh3NICE TO HAVE /h3ulliExperience with consumer mobile apps, gaming, advertising, loyalty, or rewards products /liliExperience with recommender systems, personalization, churn, LTV, or fraud models /liliExperience with causal inference, uplift modeling, or large-scale experimentation /liliFamiliarity with mobile attribution frameworks, including Apple's SKAdNetwork /li /ulh3WHAT'S IN IT FOR YOU /h3ulliBe part of a mission-driven company making a tangible difference in people's lives, one step at a time. /liliReal ownership: lead high-impact data science initiatives and build solutions used by millions from day one. /liliOpportunities for professional growth, learning, and international exposure. /liliA supportive, talented, and passionate international team. /liliOffices in the heart of Barcelona. /liliWellness allowance (powered by Urban Sports). /liliHybrid working culture with international flexibility. /liliFriday team lunch. /liliCompany events and offsites. /li /ulh3WHY MACADAM? /h3pWe don't just talk about change - we walk it. /pullibMake it happen /b - take ownership, drive outcomes that matter. /lilibBuild together, win together /b - support and challenge each other to go further. /lilibTrust the data /b - decide clearly, act confidently, measure what counts. /lilibBuild for people /b - design with empathy, simplicity, real humans in mind. /lilibThink bigger /b - set the bar high, push boundaries, imagine better ways. /li /ul /p #J-18808-Ljbffr

📌 Senior Data Scientist (Barcelona)
🏢 MACADAM
📍 Barcelona