Senior AI Agent Builder - Temp - Freelance

Context

A global leader in materials technology and recycling, headquartered in Belgium, focuses on clean mobility and circular economy solutions by developing high-performance materials for rechargeable batteries, automotive catalysts, and precious metals recycling. With a strong commitment to sustainability, the company aims to reduce harmful emissions, power the vehicles of the future, and give new life to used metals.

The Computational Science - Data Science team (part of the Corporate Research & Development department) located in Belgium & Germany is expanding its agentic AI capability to support a growing internal customer base. The team has an established framework and supporting expertise (data scientists, tooling, and ways of working) and is now looking for hands-on builders who can translate real business needs into working AI agents.

The assignment is based in Hanau, Germany, with strong local stakeholder interaction and a practical delivery focus (prototype, validation, productionisation).

Missions

• Translate business context (process steps, decision rules, documents, and data) into structured agent designs: tools/functions, workflows, guardrails, and evaluation criteria.

• Build, iterate, and harden AI agents using the existing framework and tooling (including agent-to-agent collaboration patterns where required).

• Implement retrieval and context strategies so agents can reliably use internal knowledge sources (documents/data) while maintaining quality and traceability.

• Integrate agents with relevant systems and interfaces (APIs, data sources, process triggers) to enable autonomous task execution where feasible.

• Define and execute testing approaches (functional, robustness, regression) and support user validation with business owners.

• Support production-readiness activities: monitoring/logging concepts, error handling, prompt/version control, deployment collaboration (DevOps where applicable).

• Create clear documentation and knowledge transfer materials so solutions can be maintained and scaled across more internal customers.

• Collaborate with the team and stakeholders to drive adoption and ensure solutions fit operational reality.

Tools & Environment

• Agentic AI frameworks and tooling, including LangGraph (preferred) and/or LangChain for agent/workflow orchestration.

• GPT-family / LLM APIs or comparable models.

• Python programming language with clean code practices, modular design, and version control (Git).

• Integration with data sources and enterprise artefacts (documents, structured data, process data) via lightweight connectors/APIs.

• Reliability patterns for LLM applications: prompt/versioning, structured outputs, fallbacks, caching, observability, evaluation.

• DevOps/MLOps exposure (CI/CD, containerisation, environment management, deployment pipelines, monitoring) is a plus.

• Agile delivery setup (Scrum/Kanban) and iterative product development methodologies.

Working Conditions

• Location: Hanau, Germany

• On-site presence required: 3 days per week following client’s guidelines

• Contract type: Temporary

• Start date: ASAP (targeting end of May / beginning of June)

• Duration: Until end of the year, extension possible based on results

• Compensation currency: EUR

Additional Information

• Language proficiency: English fluent (spoken and written); German and other languages are nice to have.

• Safety equipment: Not applicable (note that for other sites a neon vest is mandatory).

• Travel: None required (0%).

• NDA: Not applicable.

• SCC (VCA) certificate: Not applicable.