Logo Delivery Hero SE

Senior AI Scientist

Job

  • Level
    Senior
  • Job Field
    Software, Data
  • Employment Type
    Full Time
  • Contract Type
    Permanent employment
  • Location
    Berlin
  • Working Model
    Hybrid, Onsite
  • Job Summary

    In this role, you design and implement autonomous AI agents, optimize RAG pipelines, and develop APIs to create intelligent systems that make independent decisions and evolve over time.

    Job Technologies

    Your role in the team

    • We are on a lookout for a hands-on Senior AI Scientist (Agentic AI) to join the Vendor Data Team on our journey to always deliver amazing experiences to 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.
    • Architect and deploy agent-based systems using LangGraph, PydanticAI, LangChain, Google ADK, Claude SDK, or custom-built orchestration frameworks.
    • Build and optimize RAG pipelines - from smart chunking to embedding strategies and vector search.
    • Design self-evolving prompt systems and dynamic decision flows driven by LLMs.
    • Develop APIs and services that let models talk to tools, data, and other systems.
    • Monitor, evaluate, and automate model feedback loops using AI-based simulation and testing agents.
    • Work cross-functionally with product and engineering teams to ship AI-native features, not just prototypes.

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    Our expectations of you

    Qualifications

    • Deep knowledge of RAG, LLM mechanics, prompt design, and chaining.
    • You take ownership. If something is unclear or blocked, you figure it out or find a way around it.
    • You move fast but don't cut corners - you care about quality and impact.
    • You believe working code beats perfect plans, and that iteration is the fastest way to clarity.
    • Judge models, feedback loops, or human-in-the-loop architecture.
    • Vertrautheit mit Prompt-Injection-Abwehr, Output-Validierung oder Agentensicherheit.
    • Background in shipping AI inside real-world web or mobile products.

    Experience

    • 2+ years of experience in applied AI/ML engineering with real-world deployments.
    • Strong Python skills and experience with frameworks like LangChain, LlamaIndex, or Haystack.
    • Experience with vector databases (Pinecone, Weaviate, FAISS) and embedding models.
    • Nice to have: Open-source model experience (e.g., LLaMA2, Mixtral, Mistral) or custom inference stacks.
    • Experience designing test harnesses using agent personas or synthetic users.

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    What we offer

    • Ensuring you and all our Heroes are looked after, happy, and healthy is always on the menu.
    • 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 of holiday, with an additional day in the 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.

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    Benefits

    Food & Drink

    Work-Life-Integration

    Health, Fitness & Fun

    Topics that you deal with on the job

    Job Locations

    • Location Berlin

      Germany

    This is your employer

    Delivery Hero SE

    Delivery Hero SE

    What started as an ambitious idea is now the leading local delivery company. Delivery Hero is present in around 50 countries across four continents and is on a mission to deliver anything, straight to customers’ doors.

    Description

  • Founding year
    2011
  • Language
    English
  • Company Type
    Established Company
  • Working Model
    Hybrid, Onsite
  • Industry
    Trade
  • Dev Reviews

    by devworkplaces.com

    Total

    (1 Review)
    3.2
    • Career Growth

      3.2
    • Culture

      3.2
    • Engineering

      2.7
    • Workingconditions

      3.8
    Show All Dev Reviews
    Logo Delivery Hero SE

    Senior AI Scientist

    Location
    Berlin
    Working Model
    Hybrid, Onsite
    Diversity
    Open for all genders
    English Only
    English only required

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