AI Engineer – Conversational AI Systems (f/m/x)

Job description

At idealo, we are building a conversational AI experience – a product-aware assistant that helps millions of users explore, compare, and decide on purchases through natural dialogue. Our system brings together RAG-powered access to product data, agent orchestration, and explainable result evaluation, creating an AI interface that is transparent, reliable, and impactful.

As an AI Engineer, you will combine conceptual thinking with hands-on engineering to design, implement, and evolve this AI-native experience. You will stay up-to-date in this dynamic field, continuously testing the latest AI developments and integrating them into production systems when they meet a real business need. You will work closely with our Fullstack Developers and Machine Learning Engineers (MLEs), collaborating across the stack to deliver robust, scalable AI workflows that connect seamlessly with idealo’s product ecosystem.

About your new role

• Build a sustainable, modular agent-style application that integrates existing components and conversational UIs.
• Develop and iterate frontend conversational formats and connect them to backend services and prompt systems.
• Design, implement, and evolve agent architectures using common patterns and frameworks (e.g. LangChain, CrewAI, AutoGen).
• Work with RAG pipelines to ensure relevant and up-to-date retrieval of product information.
• Develop and evaluate prompt flows – optimizing language quality, task alignment, and output stability.
• Define and monitor AI-specific non-functional requirements (e.g. hallucination rate, response quality, content safety, explainability).
• Stay on top of new AI capabilities, assess them critically, and integrate them into production systems when they add clear business value.
• Collaborate closely with product teams, Fullstack Developers, and MLEs to translate user and business needs into a flexible AI roadmap.

Skills & Requirements

• Proven experience building agent-style applications with real-world impact (LLM orchestration, tools, memory, autonomy).
• Hands-on knowledge of RAG concepts and implementation.
• Track record in prompt engineering, prompt evaluation, and optimization strategies.
• Strong skills in both frontend development (conversational UIs) and backend orchestration.
• Experience with retrieval architectures, context assembly, and vector stores.
• Ability to think conceptually and strategically about AI systems, while executing on technical implementation.
• Deep curiosity and initiative: you enjoy fast prototyping, experimentation, and iterative design.
• Bonus points: Experience in AI system scaling, performance tuning, and quality assurance.

Job requirements

At idealo you can expect

• You need vacation? We offer you 30 days of vacation. Not enough? You can "buy" an additional 15 days every year by converting your salary and it's seen as a positive thing.
• You want to further your education? We take your personal development goals seriously and, in addition to our idealo Learning Hub, eLearning offerings (e.g., Udemy), coaching & mediation, we also offer you the opportunity to benefit individually from additional learning and development budget.
• And what about the office? Our office in the heart of Berlin offers excellent free lunch, as well as free coffee, lemonades and after-work beer, in addition to the "standard foosball". It also has a fabulous rooftop terrace with view of the whole of berlin where you can network with colleagues from our group of companies.
• You want full flexibility on your way to work and beyond? No problem with a job bike or Deutschlandticket - and it's environmentally friendly, too!
• You don't live in Germany yet? We support you in the visa process and with your relocation.
• Want to keep yourself fit? We offer many different fitness and sports options, such as an Urban Sports or Gympass membership, to suit your personal needs.

About idealo

idealo is a Berlin success story: in 2000 we started out with the mission of helping consumers make the best purchasing decisions. Today, with ~2.5 million visits per day, ~50,000 shops, and more than ~500 million product offers, we are one of the most popular German e-commerce websites and one of the leading European shopping and comparison platforms. We are active as a price comparison platform in six countries (Austria, France, Germany, Great Britain, Italy, and Spain).

We are located in the heart of Berlin and offer a unique idealo spirit. Your ideas are the driving force that moves our business forward. Not only our product portfolio is diverse, but also the people who work on it. We want you just as you are! Origin, religion, gender, sexual orientation, or a degree of disability are irrelevant.

If you are passionate about improving the world of online shopping alongside ~700 idealos from ~60 nations, we are happy to receive your application!

Information for applicants with severe disabilities: As an applicant with a severe disability, you can get advice from our Representative Body for Severely Disabled People (SBV) during the application process. Please inform us regarding this topic.

For the inclusion of people with disabilities, our office is accessible without steps. When you start with us, we will see what else is needed!

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