Senior Data Scientist (all genders)

at  Justplay GmbH

YOUR MISSION

We are seeking a highly skilled and experienced Senior Data Scientist to join our team. The ideal candidate will have a strong background in Machine Learning, Statistical Analysis, and Deep Learning, with over 5 years of professional experience. This role requires an expert in creating and optimizing User Acquisition models, LTV predictions, Ad Monetization strategies, and performing in-depth Product Analytics. The candidate should also be proficient in A/B testing and possess excellent project management skills. Familiarity with Python is essential, and experience in the mobile gaming industry is highly preferred.

THE EXPERIENCE WE HOPE YOU BRING TO JUSTPLAY

• 6+ years of professional experience in data science, focusing on machine learning, statistical analysis, and deep learning. Ideally paired with experience in the mobile gaming industry
• Proven expertise in user acquisition modeling, product analytics, and A/B testing methodologies and tools
• Proficiency in Python (Pandas, NumPy, Scikit-learn, TensorFlow, PyTorch)
• Familiarity with SQL for database querying and data manipulation
• Strong knowledge of statistical methods and their application in business
• Experience with cloud platforms (AWS, GCP) is a plus
• Strong project management skills, with a track record of leading data science projects
• Excellent communication skills and the ability to translate data into insights
• Strong problem-solving skills and the ability to work collaboratively in a cross-functional team environment

Nice-to haves:

• Experience with mobile gaming analytics
• Hands-on experience with Looker for data visualization and reporting
• Familiarity with ad tech tools and platforms (e.g., Google Ads, Facebook Audience Network, Firebase)
• Knowledge of reinforcement learning and its applications in gaming or ad optimization

ABOUT US

JustPlay is a worldwide gaming loyalty platform operator and publisher. Our purpose is to enable free-to-play mobile game players to get rewarded for their hobby. We launched JustPlay in the US in 2020, and now our product is one of the leading loyalty rewards apps in the world and our games are enjoyed by millions of players (our solitaire game is one of the top 5 most downloaded card games in the US). Our team is based in 13+ countries and our headquarters are in Berlin, Germany. While developing our loyalty app and awesome games, we value fairness, having fun together, creativity and focusing on the things that matter

• User Acquisition Modeling: You will build and optimize machine learning models to enhance user acquisition, predict user behavior, and improve campaign performance. You will collaborate with marketing and product teams to refine audience targeting and maximize ROI
• Product Analytics: You will be responsible for conducting in-depth product analysis to identify key metrics and areas for improvement, using data insights to guide product development and enhance user experience. Additionally, you will collaborate with product managers to steer data-driven features and improvements
• A/B Testing: You will collaborate closely with the product team to design, implement, and analyze A/B and multivariate tests to optimize product features and marketing strategies. During those initiatives, you will be responsible for ensuring scientific rigor and proper statistical methods. Finally, you will support interpreting the results and providing actionable insights to stakeholders
• Machine Learning & Statistical Analysis: You will develop and deploy machine learning models for predictive analytics, user segmentation, and personalization, while applying deep learning techniques for complex data analysis tasks (image recognition, natural language processing, etc.) to drive user acquisition and monetization of our JustPlay app
• Project Management: Lead data science projects from concept to delivery, coordinating with cross-functional teams (including Engineering, Product, and marketing) and managing timelines, deliverables, and stakeholder communication