Lead Data Scientist | Mobile Games | Hybrid | Warsaw, Limassol

Mobile game development company seeks a Lead Data Scientist to build ML solutions for ad monetization, personalization, and recommendations, and to lead and mentor the Data Science team. Hybrid role in Warsaw or Limassol.

Mobile game development company is developing one of the world's most successful ad-driven products - a digital coloring book with a multi-million audience. The Lead Data Scientist will develop ML solutions for advertising monetization, personalization, and recommendations, and lead and mentor the Data Science team.

5+ years of experience in Data Science, preferably in consumer mobile products. Required experience in advertising monetization, revenue optimization, or advertising analytics. Experience developing recommendation, personalization, or ranking systems. Strong Python and SQL. Practical experience with ML: classification, regression, ranking, forecasting, predictive modeling. Understanding of A/B testing, applied statistics, and working with large behavioral datasets. Experience in technical leadership or mentoring Data Scientists.

Hybrid work in Warsaw, Limassol. Direct impact on advertising revenue, engagement, retention, and LTV. Work with large behavioral data and ML models in a product with millions of users. Opportunity to shape the Data Science direction, roadmap, and technical standards. Cross-functional work with Product, Engineering, Analytics, and Ad Monetization.