Senior AI Engineer — RAG Applications (Azure / Kubernetes)

About the Position

Senior AI Engineer - RAG Applications (Azure / Kubernetes) (STIB-PU_2026_063)

STIB-MIVB (Brussels public transport operator) is building several employee- and customer-facing AI services, serving our customers and employees across the organization. The AI services are built and run on our STIB AI Platform. We are recruiting a Senior AI Engineer to join the Digital Innovation / AI CoE team for the Build and hypercare phases of some of our most complex AI services.

Responsibilities

• Deliver the RAG pipeline end-to-end, from retrieval strategy to answer generation.
• Develop the ingestion pipeline: connectors to source platforms, chunking, embedding, incremental refresh.
• Implement security trimming and ACL propagation.
• Orchestrate agents, prompt templates, and guardrails.
• Set up evaluation and tracing: offline evaluation sets, retrieval and answer-quality metrics, end-to-end tracing of requests and agent steps.
• Create Terraform, Helm, and Azure DevOps artifacts needed to deploy and operate the service.
• Ensure observability and cost control: instrumentation for latency, token consumption, and run cost, plus quality regression detection after model or prompt changes.
• Provide hypercare and early production support: incident analysis, tuning, runbooks, documentation, and handover of the service to the engineer who will own the Run phase.

Requirements

• Roles: Senior AI Engineer
• Languages:
  • Dutch: Native or bilingual proficiency
  • French: Native or bilingual proficiency
  • English: Full professional proficiency
• Skills:
  • Python: Advanced
  • Azure Kubernetes Service - AKS: Advanced
  • RAG (Retrieval-Augmented Generation): Advanced
  • LangChain: Intermediate
  • Azure DevOps: Advanced
  • Terraform: Advanced
  • Vector databases: Intermediate
  • LLM / Large Language Models: Advanced

Nice to Have

• Experience with Azure OpenAI Service

We Offer

• Competitive salary
• Opportunity to work in Brussels, Belgium
• Full-time position

About the Company

ProUnity est le point de contact unique (SPOC) pour cette mission. Si vous avez des questions, vous pouvez contacter Henri Couchard, MSP Consultant, par e-mail à [email protected]

ProUnity is the single point of contact (SPOC) for this mission. If you have any questions, you can contact Henri Couchard, MSP Consultant, by email at [email protected]