Lead AI Engineer

Lead AI EngineerCentral London | Up to £150,000 + Benefits | Hybrid, typically 2 days a weekThe opportunityJoin an established FinTech whose AI technology is used by every one of the world's top 10 banks.The platform processes hundreds of thousands of financial documents every day with 99.99%+ extraction accuracy.Some of the founding ML models still sit at the heart of the platform. You'll help fine-tune and evolve them while pushing further into LLMs, agentic AI and the next generation of the product.The roleThis is technical leadership without stepping away from engineering.You'll remain hands-on while mentoring engineers, influencing architecture and helping set the technical direction of the AI platform.You'll work across:Fine-tuning and evolving production ML modelsLLMs, RAG and Agentic AIMulti-agent architecturesLarge-scale production AI systemsTechnical leadership and mentoringArchitecture and engineering standardsWhat we're looking forYou'll need strong experience building production AI/ML systems, alongside previous technical leadership experience.Their tech stack: Python | AWS | ML | LLMs | RAG | LangGraph | PyTorch | Docker | Kubernetes | and a tiny tiny bit of typescript (node.js)You'll also need experience within a financial environment, whether that's:FinTech | Banking | Payments | Trading | Capital Markets | Private Equity | Private Credit | Investment Management | Wealth Management | Financial DataWhy join?You'll be working somewhere ML has been fundamental to the product from the beginning, not recently added because AI became popular.You'll inherit proven ML systems, help improve them and have significant influence over what gets built next.Up to £150,000 + benefits | Central London | Typically 2 days a weekApply with your CV or LinkedIn profile. We can sort everything else afterwards.