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# Senior Data Scientist

- **Company:** adjoe GmbH
- **Location:** Hamburg, Germany
- **Experience:** Expert
- **Salary:** €84,000.0
- **Contract:** Permanent contract
- **Skills:** Airflow, Amazon Web Services, Artificial Neural Networks, Python (Programming Language), Recommender Systems, SQL Databases, Reinforcement Learning, Delivery Pipeline, Kubernetes, Optimization Algorithms, Machine Learning Operations
- **Published:** July 19, 2026
- **Apply:** https://www.xing.com/jobs/hamburg-senior-data-scientist-156322776

## About the Role

* 4+ years in Data Science, ideally in AdTech or a high-volume consumer product. You have a track record of architecting and deploying large-scale recommender systems and neural networks in production. At adjoe Ads, that means owning models that influence 10 billion daily predictions in a real-time bidding environment.
 * Relevance modeling and policy optimization are your core. You design targeting models that understand user preferences at scale, and develop bidding policies using Bayesian methods, reinforcement learning, and other advanced optimization algorithms, continuously adapting them to the real-time bidding landscape.
 * End-to-end ownership, not just research. You harden successful experiments into scalable production solutions using Python, Airflow, MLflow, Trino, and Kubernetes on AWS. You balance speed-to-market with engineering rigor, and know when an 80% solution is exactly what the business needs.
 * Comfortable in a sophisticated distributed environment. You write excellent Python and SQL, have hands-on experience with automated training and deployment pipelines, and can navigate a stack producing massive amounts of data across a several hundred TB of data without losing sight of the business goal.
 * Strong mathematical foundation, clear communicator. You dive deep into complex algorithms and translate them into clear explanations for both technical and non-technical audiences. You engage in direct, constructive architectural debates and actively raise the technical bar around you.



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