Senior AI Engineer (Gen AI & RAG)

Salary: £75,000 - 85,000 per year

Requirements:

• Strong Python proficiency for production-grade AI development, with hands-on experience across LlamaIndex, LangChain, and LangGraph.
• Proven track record building Retrieval-Augmented Generation (RAG) systems; Graph-RAG exposure is a distinct advantage.
• Practical experience with model adaptation techniques including prompting, fine-tuning, instruction tuning, or knowledge distillation.
• Solid grounding in evaluation and experimentation methodology for generative AI, with a focus on correctness, faithfulness, and robustness.
• Demonstrable experience owning the technical design and delivery of complex AI, ML, or data-driven systems in live production environments.
• Experience operating at senior engineer or technical lead level, balancing rapid experimentation with disciplined production delivery.
• Ability to communicate clearly with both technical and non-technical stakeholders.

Responsibilities:

• 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, including prompting, fine-tuning, and distillation, to optimise quality, latency, and cost efficiency.
• Drive experimentation and evaluation practices, measuring correctness, faithfulness, and robustness across AI outputs.
• Provide hands-on technical leadership, mentoring engineers, and contributing 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.

Technologies:

• AI
• Python
• Architect

More:

We are an award-winning, internationally recognised B2B consultancy with an ambitious AI roadmap. We are hiring a Senior AI Engineer to take a central role in delivering and evolving production-grade generative AI capabilities that power real-world business outcomes. This is a hands-on, senior role reporting to our Director of AI, working closely with our AI Platform Engineering team and collaborating across platform, product, and delivery teams. The role is based in Greater London, England, United Kingdom, on-site, and offers the opportunity to shape customer-facing products with genuine technical ownership and autonomy.

last updated 32 week of 2026