Hybrid Senior Data Scientist – Generative AI

at Libri GmbH

• Job title: Senior Data Scientist – Generative AI
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Amazon Redshift, AWS, Cloud, Pandas, Postgres, Python, PyTorch
• Location requirements: Hybrid, Hamburg, Germany

About the role

• Senior Data Scientist role focused on Generative AI solutions. Working within Analytics and Data Science to enhance customer experiences and drive new business areas.

Responsibilities

• Develop and implement generative AI systems in our AWS cloud — e.g., for customer service (AI assistants), internal knowledge work (company GPT), personalization in the online shop, or marketing (generative image AI)
• Select suitable LLMs, adapt and fine-tune models, and develop custom models for tasks such as text classification or forecasting
• Translate business requirements into technical solutions together with the relevant departments
• Drive AI initiatives together with the team and our AI task force — from employee training to building the AI architecture
• Evaluate new methods (LLMs, RAG, recommender systems, forecasting)
• Work closely with data engineers, analysts and data scientists — including cross-functional topics such as data integration and the further development of our AWS infrastructure

Requirements

• A completed degree in Data Science, Computer Science, or a related field — or equivalent practical experience
• Several years of experience successfully deploying data science and AI models into production in a corporate environment
• Excellent knowledge of Python and common libraries (e.g., PyTorch, Pandas, LangChain)
• Solid experience with cloud engineering (ideally AWS) to bring models into production in our infrastructure
• Confident handling of databases (Postgres, Redshift, vector DBs) and APIs
• Strong communication skills and enjoyment in explaining complex topics clearly
• Proactive, solution-oriented working style and enthusiasm for driving innovation within the team
• Fluent in German (C1), both spoken and written

Benefits

• A permanent position with a 38.5-hour workweek and flexible working hours (flexitime)
• Varied tasks where personal responsibility and team spirit complement each other
• A great team, full support, thorough onboarding and opportunities for further training
• An open atmosphere with short communication lines and fast decision-making processes
• A versatile, autonomous and designable work environment both in the office and from home
• Collective agreement and additional benefits, such as 30 days of vacation, a €29 Germany public transport ticket, corporate benefits and employee discounts
• A modern workplace located in Hamburg-Bahrenfeld with direct S-Bahn and A7 motorway connections