Senior AI Engineer - Series A - £110k + Equity

I’m partnered with one of the most exciting AI start-ups in London right now as they scale towards Series B 🚀 They’re building production AI systems that turn weeks of due diligence into minutes - already trusted by major enterprises, financial institutions, consultancies, universities, and global organisations. This is not an AI research role. It’s about building real-world LLM systems that customers rely on for high-stakes decisions. The role: You’ll own parts of the AI pipeline end-to-end across: • LLM agents • Entity resolution • Report generation • Evals \& system optimisation • Accuracy, latency, and cost improvements The environment is highly agentic - Claude Code, Codex, and AI-native workflows are embedded into how the engineering team operates day-to-day. They’re looking for someone who: • Has shipped production LLM systems (RAG, prompting, agents) • Comes from a strong software engineering background • Has worked in fast-moving startups or high-performing tech teams • Understands evals, reliability, and real-world AI trade-offs • Wants high ownership and the chance to shape product direction Why join? • Team scaling rapidly post-fundraise • Strong product-market fit and global customer growth • Complex real-world AI problems with genuine impact • High-calibre engineering culture with lots of ownership 📍 London hybrid 💰 £90k–£110k + equity 🚀 High-growth AI company