AI Engineer

dunnhumby is the global leader in Customer Data Science partnering with the worlds most ambitious retailers and brands to put the customer at the heart of every decision. We combine deep insight advanced technology and close collaboration to help our clients grow innovate and deliver measurable value for their customers.

dunnhumby employs nearly 2500 experts in offices throughout Europe Asia Africa and the Americas working for transformative iconic brands such as Tesco Coca-Cola Nestlé Unileverand Metro.

Most companies try to meet expectations dunnhumby exists to defy them. Using big data deep expertise and AI-driven platforms to decode the 21^st century human experience then redefine it in meaningful and surprising ways that put customers first. Across digital mobile and retail. For brands like Tesco Coca-Cola Procter & Gamble and PepsiCo.

We are looking for a hands-onAI Engineer to build production-grade AI systems powered by LLMs and agents. This role goes beyond prototypes youll design reliable observable and safe AI applications at scale.

Key Responsibilities

• Design and develop LLM-powered applications and AI agents for real-world use cases
• Build and orchestrate agent workflows using LangChain and LangGraph
• Implement human-in-the-loop (HITL) systems for controlled AI decision-making
• Design and optimize RAG pipelines
• Advancedretrieval strategies (hybrid search re-ranking filtering)
• Effective chunking strategies (semantic chunking hierarchical chunking context-aware splitting)
• Integrate and work with MCP (Model Context Protocol) servers for tool and context orchestration
• Integrate with Vertex AI and/or Azure AI Foundry for model deployment and lifecycle management
• Implement guardrails (prompt injection defense output validation policy enforcement)
• Build evaluation frameworks for model quality hallucination detection and regression testing
• Ensure observability (traces metrics logs) for LLM applications in production
• Collaborate with platform data and product teams to deliver end-to-end solutions

Required Skills

• 35 years of experience in AI/ML or backend engineering
• Strong programming skills in Python
• Hands-on experience with LLMs NLP and AI agents
• Strong experience with LangChain and LangGraph
• Experience implementing human-in-the-loop workflows
• Solid understanding of RAG systems including retrieval and chunking strategies
• Experience working with or understanding MCP servers / tool orchestration frameworks
• Strong understanding of evaluation frameworks (LLM evals prompt testing benchmarking)
• Experience designing and implementing AI guardrails and safety mechanisms
• Proficiency in cloud platforms (GCP or Azure)
• Experience with Vertex AI and/or Azure AI Foundry is required
• Experience with APIs microservices and scalable system design

Good to Have

• Experience with vector databases (Pinecone Weaviate FAISS etc.)
• Familiarity with observability tools for AI systems (tracing token usage latency tracking)
• Experience with Kubernetes / containerized deployments
• Exposure to event-driven systems (Kafka Pub/Sub etc.)
• Knowledge of multi-agent architectures and planning/reasoning patterns

What you can expect from us

We wont just meet your expectations. Well defy them. So youll enjoy the comprehensive rewards package youd expect from a leading technology company. But also a degree of personal flexibility you might not expect. Plus thoughtful perks like flexible working hours and your birthday off.

Youll also benefit from an investment in cutting-edge technology that reflects our global ambition. But with a nimble small-business feel that gives you the freedom to play experiment and learn.

And we dont just talk about diversity and inclusion. We live it every day with thriving networks including dh Gender Equality Network dh Proud dh Family dh One dh Enabled and dh Thrive as the living proof. We want everyone to have the opportunity to shine and perform at your best throughout our recruitment process. Please let us know how we can make this process work best for you.

Our approach to Flexible Working

At dunnhumby we value and respect difference and are committed to building an inclusive culture by creating an environment where you can balance a successful career with your commitments and interests outside of work.

We believe that you will do your best at work if you have a work / life balance. Some roles lend themselves to flexible options more than others so if this is important to you please raise this with your recruiter as we are open to discussing agile working opportunities during the hiring process.

For further information about how we collect and use your personal information please see our Privacy Notice which can be found (here)