AI Software Engineer (m/w/d)

The role

Our AI assistant is built into the WHISE CRM and helps real estate agents get more out of their data every day.

We are looking for an AI Backend Developer to drive the development of the WHISE AI assistant. You will own the agent backend end to end, from orchestration and tools to the data access layer.

Your Responsibilities

• Design, build and maintain the backend of the AI assistant: orchestration, tool integrations and data access.
• Integrate the assistant with the WHISE CRM API.
• Maintain the evaluation and observability setup so releases are measured before they ship.
• Keep agent actions safe and auditable, with approval flows for changes to data.
• Work with our product and development squads on integrating the assistant into the WHISE product.

Who you are

• Curious. You want to keep learning, and you enjoy teaching others what you pick up.
• A team player. You share what you know, ask for help early and give feedback that people can use.
• Open-minded. You take a challenge to your idea as a chance to improve it, and you give the same in return.
• Positive under pressure. You handle deadlines and stress with a cool head. When something breaks, you look for the fix, not for someone to blame.

Requirements

• 5+ years of experience in backend development.
• Strong programming skills in both Python and C#.
• Experience architecting and building AI/LLM systems: agent frameworks, RAG pipelines, multi-model orchestration and MCP servers.
• Production experience with LLM frameworks such as Agno, Microsoft Agent Framework or PydanticAI.
• Experience evaluating and monitoring LLM systems for quality, drift, latency and cost (LLM-as-judge, rubrics, regression checks).
• Hands-on prompt design, prompt caching and token cost control across several LLM providers, through a gateway such as LiteLLM.
• Solid grasp of web application security: authentication and session management, secure handling of credentials and tokens, and input validation.
• Experience integrating large third-party REST APIs into a product, e.g. email provider APIs (Microsoft Graph, Gmail API).
• Fluent German and English.
• Willing to travel to our locations in Germany, Belgium and Romania.

Bonus points

None of these are required. If you bring one or two, you have a head start. The rest you’ll pick up with us.

• Cloud and DevOps on Azure: Docker, Kubernetes (AKS), CI/CD with Azure DevOps or ArgoCD.
• LLM observability and cloud LLM platforms (OpenTelemetry, Arize Phoenix, Azure AI Foundry, AWS Bedrock).
• Some frontend experience, ideally React and TypeScript for chat interfaces.
• Vector search (pgvector) or LLM fine-tuning.
• Working knowledge of GDPR and the EU AI Act, or experience in SaaS or proptech.
• Another European language, such as French, Dutch or Spanish.
  

What we offer

• Salary: €60,000 – €90,000 gross per year
• 30 days of paid vacation.
• A hybrid working model: we encourage working from the office and flexibility at work. We expect 3 days per week in the office; the rest can be from home.
• Benefits
• Equipment, e.g. laptop of your choice
• A team where your architecture decisions ship.
• Continuous upskilling: internal coaching, knowledge sharing across teams and a budget for external courses.
• A small, open team where ideas are heard whoever they come from, decisions are pragmatic and success is shared.
• Exciting, challenging work that stretches you: ambitious goals, real deadlines and a team that has your back.
• Based in Hamburg or Nuremberg.