Senior Data Scientist – Deep Learning & Recommendation Systems

Hamburg, Germany (Hybrid) | Full-Time

Are you interested in solving complex machine learning problems at scale?

We are supporting an innovative technology company in Hamburg looking for a Senior Data Scientist to join a highly technical team developing large-scale deep learning solutions for recommendation, ranking and personalisation.

You will work on production machine learning systems where advanced models directly influence user experiences and business outcomes, developing intelligent algorithms that understand behaviour, optimise relevance and deliver personalised experiences at scale.

Tasks

Build and optimise deep learning models for recommendation, ranking and personalisation
Develop scalable machine learning solutions using modern deep learning techniques
Work with large-scale datasets to improve model performance and user relevance
Design experiments, evaluate model performance and validate new approaches
Take ownership of ML models from research and development through to production deployment
Collaborate closely with engineers and product teams to deliver measurable business impact
Contribute technical expertise and best practices within the machine learning community

Requirements

7+ years of experience in Data Science, Machine Learning or Applied Science
Extensive experience building production machine learning systems
Strong hands-on experience with deep learning frameworks such as PyTorch and/or TensorFlow
Experience developing recommendation systems (RecSys), ranking algorithms or personalisation models
Strong Python and SQL skills
Experience working with large-scale production datasets
Strong understanding of experimentation, model evaluation and production ML workflows

Benefits

Competitive salary package up to €140,000, depending on experience
Hybrid working model in Hamburg
International English-speaking environment
Opportunity to work on technically challenging deep learning and recommendation systems
Flexible working arrangements
Relocation support available
Strong opportunities for technical ownership and career growth

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