Senior AI Engineer (Gen AI & RAG)

Greater London, England, United Kingdom (On-site)

Join an award-winning, internationally recognised B2B Consultancy as a Senior AI Engineer, where you will play a central role in delivering and evolving production-grade generative AI capabilities that power real-world business outcomes.

This is a senior, hands-on engineering role focused on building the intelligence layer of next-generation AI products. You will architect and implement Retrieval-Augmented Generation (RAG) pipelines, agentic workflows, and rigorous evaluation frameworks that ensure AI systems are accurate, reliable, and grounded in genuine business value.

Reporting to the Director of AI, you will bridge strategy and execution - translating architectural direction into high-quality, scalable implementations in close collaboration with AI Platform Engineering.

What You'll Do

• Design, build, and deploy production-grade generative AI systems that perform reliably at scale.
• Implement and continuously improve RAG pipelines that effectively leverage proprietary and domain-specific content.
• Develop agentic and workflow-driven AI patterns with a strong emphasis on determinism, quality, and long-term maintainability.
• Apply model adaptation techniques - prompting, fine-tuning, distillation - to optimise for quality, latency, and cost efficiency.
• Drive strong experimentation and evaluation practices, measuring correctness, faithfulness, and robustness across AI outputs.
• Provide hands-on technical leadership, mentoring engineers and contributing meaningful code-level guidance across the team.
• Work closely with platform, product, and delivery teams to accelerate the path from AI experimentation to production deployment.
• Explore and apply advanced retrieval approaches, including Graph-RAG and structured knowledge representation, where they deliver clear value.