Staff Data Scientist (AdTech Expert) (f/m/d) at adjoe

Hamburg, Germany

true · full_time · Visa sponsorship

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Responsibilities:
- Lead design and delivery of advanced targeting and relevance models (conversion, user quality, LTV) for real-time bidding.
- Research and implement policy optimization approaches (Bayesian methods, reinforcement learning, meta-learning) to improve bidding and allocation KPIs.
- Architect scalable model training and serving pipelines using distributed compute (Spark, Ray) and ensure rigorous A/B testing and rollout strategies.
- Mentor and upskill engineers and scientists; establish best practices for reproducibility, code quality and experiment design.
- Drive cross-functional collaboration to align ML solutions with product, monetization and privacy constraints.

Requirements:
- 10+ years of experience in machine learning with strong focus on ad tech, bidding algorithms or LTV/prediction systems.
- Deep expertise in modern ML (deep learning, Bayesian methods, RL, meta-learning) and production deployment at scale.
- Practical experience with distributed data processing (Spark, Ray), experimentation platforms and model serving infrastructure.
- Strong software engineering skills in Python, ability to mentor teams and communicate technical trade-offs to stakeholders.
- Track record of shipping impactful ML systems that improve business KPIs in fast-moving production environments.