Principal AI Architect – GenAI / Enterprise AI Platform

Location: London (Hybrid)

Hands-on Principal Role | Build, Scale & Own Production AI Systems

Our client is a globally recognized enterprise software company investing heavily in next-generation AI and decision intelligence platforms used by major international organisations.

This is a principal-level, hands-on architecture role for someone who wants to go beyond strategy. You’ll design, build, and scale production-grade AI systems embedded directly into a live enterprise product.

You’ll play a key role in shaping how LLMs, Generative AI, and agentic systems are applied at real-world scale.

What You’ll Be Doing

• Defining and delivering end-to-end architecture for GenAI capabilities
• Designing and building agentic AI systems (reasoning, orchestration, multi-step workflows)
• Architecting LLM-powered applications (RAG, vector search, semantic layers)
• Building and scaling AI systems in production (performance, reliability, observability)
• Driving architecture across distributed systems, APIs, and AI platforms
• Establishing best practices for evaluation, guardrails, and monitoring
• Staying hands-on with implementation - not a pure design role

What They’re Looking For

• Proven experience designing and shipping production AI/ML systems in enterprise environments
• Strong expertise in LLMs, Generative AI, and modern AI application design
• Hands-on experience with RAG, LangChain, LlamaIndex, Bedrock, Azure OpenAI, or similar
• Strong Python and/or Java engineering background
• Deep understanding of distributed systems and scalable architecture
• Experience owning systems end-to-end (design → build → scale → operate)
• Ability to connect technical decisions to business impact

What Sets This Role Apart

• Real ownership of production AI systems, not just architecture on paper
• Opportunity to build and scale AI within a global SaaS platform
• Direct influence on product direction and AI strategy
• Strong engineering-first, delivery-focused culture