Location: Berlin, Germany (preferred) – hybrid work possible

About Affinity

Affinity is a global ad tech company creating digital products that connect brands with audiences worldwide. Our branding and performance solutions focus on sustainable growth and great user experience. Since 2006, we’ve grown to 450+ people across six business units in markets from Germany to the US, India, and Brazil. AI is now a core part of our future, and we’re looking for someone to shape its role and lead transformative projects across the company.

Your role:

We’re looking for a Data Science Engineer (m/f/d) to develop AI/ML solutions that improve ad decisioning, creative optimization, forecasting, and automation in digital advertising.

What you’ll do:

• Design and implement AI/ML algorithms for advertising use cases.
• Process and prepare structured and unstructured data for modelling.
• Build and maintain predictive models, dashboards, and automated reports.
• Identify trends and insights in large datasets, ensuring data privacy and security.
• Run experiments to test and refine new algorithms.
• Work closely with product, engineering, and sales teams to turn ideas into reality - from first prototype to production-ready systems.
• Stay ahead of AI/ML developments and bring fresh ideas into our products.

What you bring:

• 3+ years’ experience as a Data Scientist, ideally in digital advertising.
• Strong background in machine learning, statistics, and data engineering.
• Hands-on experience with ML libraries (TensorFlow, PyTorch, scikit-learn, XGBoost).
• Proficiency in Python, R, SQL, or similar languages.
• Curiosity, problem-solving skills, and the ability to explain complex topics simply.
• A collaborative mindset and the drive to see projects through to impact.

What we offer:

• A crowd of passionate and smart people from different personal & professional backgrounds, that foster open discussions, fun and a strong feedback-culture
• Working in an international environment with teams and clients located in multiple countries
• Opportunity to leverage the resources and network of a leading AdTech innovator.
• Ownership from day one and opportunities for continuous learning and growth with Udemy license.
• Flexible working hours, work-from-home, and generous vacation.

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We are committed to creating a dynamic work environment that values diversity and inclusion and welcomes individuals with different abilities. We encourage contributions from people of all ages, genders, ethnic backgrounds, religions, sexual orientations, and gender identities.