Senior Data Scientist

As the world's pioneering local delivery platform, our mission is to deliver an amazing experience, fast, easy, and to your door. We operate in over 70+ countries worldwide, powered by tech, designed by people. As one of Europe's largest tech platforms, headquartered in Berlin, Germany. Delivery Hero has been listed on the Frankfurt Stock Exchange since 2017 and is part of the MDAX stock market index. We enable creative minds to deliver solutions that create impact within our ecosystem. We move fast, take action and adapt. No matter where you're from or what you believe in, we build, we deliver, we lead. We are Delivery Hero.

Job Description
We are on a lookout for a hands-on
Senior Data Scientist-Generative AI & Agents
to join the
Vendor Data Team
on our journey to always deliver amazing experiences and go beyond prompt engineering into autonomous orchestration: designing agents that generate their own prompts, tools that empower AI with real-world actions, and judge models that validate outputs. Your work won't sit in research notebooks — it'll ship.

The Agentic AI team
is building the next generation of AI-native products — intelligent systems that reason, act, and adapt. We combine the power of large language models (LLMs), autonomous agents, and retrieval-augmented generation (RAG) to move beyond static prompts and chatbots into dynamic AI systems that solve real problems at scale. We don't treat LLMs as tools to micromanage — we treat them as collaborators. Our products are designed to build and evolve themselves, leveraging AI to orchestrate workflows, make decisions, and continuously improve. If you're ready to stop building brittle bots and start building AI that builds AI — this is your playground.

• Architect and deploy agent-based systems using LangChain, CrewAI, AutoGen, or custom frameworks
• Build and optimize RAG pipelines — from smart chunking to embeddings and vector search - Fine-tune and evaluate LLMs for reliability, relevance, and factuality
• Design evolving prompt and memory systems driven by LLMs and user feedback
• Implement simulation and feedback loops using judge models or agent testing harnesses
• Partner cross-functionally with product, research, and engineering teams
• Stay current with the latest research in LLMs, generative modeling, and agent systems

Qualifications

• Machine learning fundamentals (supervised, unsupervised, reinforcement learning) - Data wrangling and preprocessing (Pandas, NumPy, etc.)
• LLMs and NLP expertise (Transformers, BERT, GPT, etc.
• Prompt engineering & fine-tuning
• Knowledge of tokenization, embeddings, and attention mechanism
• Using and fine-tuning Hugging Face models
• Evaluation metrics for generative models (BLEU, ROUGE, faithfulness, hallucination detection)

Nice to have:

• Open-source model experience (LLaMA3, Mistral, Mixtral) or custom inference stacks - Judge models, feedback loops, or synthetic user testing architectures
• Familiarity with prompt injection defenses, output validation, or agent safety
• Experience deploying generative AI in web or mobile products
• Academic or industry background in statistics, cognitive science, or human-AI interaction

Additional Information
Ensuring you and all our Heroes are looked after, happy, and healthy is always on the menu. Because if you're in good shape, then we're in good shape.

• Make the most of our hybrid working model and join the team for face-to-face connection and collaboration in our beautiful Berlin campus 2 days a week
• We offer 27 days holiday with an extra day on 2nd and 3rd year of service
• We will support you in developing yourself and your career growth opportunities: 1.000 € Educational Budget, Language Courses, Parental Support and access to the Udemy Business platform to explore a variety of online courses.
• Get moving and release those wonderful, mind-boosting endorphins: Health Checkups, Meditation, Yoga, Gym & Bicycle Subsidy
• Cash. Dough. Cheddar. Whatever you call it, we'll help you with it: Employee Share Purchase Plan, Sabbatical Bank, Public Transportation Ticket Discount, Life & Accident Insurance, Corporate Pension Plan
• The power of getting together over some food is unrivaled. Here are a few ways to help you do that. All the yum: Digital Meal Vouchers, Food Vouchers, Corporate Discounts. Courses.

*Ready to join our team?*
If you're excited to grow, collaborate and be part of the world's leading delivery platform, we'd love to hear from you. Apply today

We believe diversity and inclusion are key to creating not only an exciting product, but also an amazing customer and employee experience. Fostering this starts with hiring - therefore we do not discriminate on the basis of racial identities, religious beliefs, color, national origin, gender identities or expressions, sexual orientations, age, marital or disability statuses, or any other aspect that makes you, you. We encourage you to let us know if you need any accommodations or specific accessibility support to ensure a smooth interview experience—just include it in your application. You're welcome to share your pronouns (he/she/they) right from the start so we can address you respectfully from our first contact.