Founding AI Engineer (LLM System, Agent & Decision Intelligence)

Founding AI Engineer (LLM Systems, Agents \& Decision Intelligence) £100,000-140,000 Depending on Experience + Equity London MBN Solutions are partnering with a start up AI platform that specialises in Synthetic Human behaviour. We are hiring a Founding AI Engineer to help build AI systems that let companies test decisions before they happen. We're building a decision platform that helps businesses understand how customers, markets, and competitors may respond before a pricing change, product launch, or growth initiative goes live. Today, many critical business decisions are still tested directly in the real world. We believe there should be a safer environment to explore those decisions first. As a Founding AI Engineer, you'll work on the intelligence layer behind that vision: • Build production-grade LLM and agentic workflows • Design evaluation, tracing, replay, and quality-control systems • Turn messy business data into reliable reasoning contexts • Improve AI reliability through structured outputs, retrieval, calibration, and testing • Develop systems that expose assumptions, uncertainty, and evidence • Help define what trustworthy AI predictions look like We're looking for someone with: ✓ 5+ years of engineering experience ✓ Strong Python and production systems expertise ✓ Hands-on experience with LLMs, agents, RAG, or AI workflow systems ✓ Experience building evaluation frameworks, tests, or quality gates for AI systems ✓ Strong product instincts and comfort working in ambiguity This isn't a prompt-engineering role, and it isn't pure research. You'll be building real systems that help customers make better decisions and continuously improve by learning from real-world outcomes. If you're excited by AI systems that are auditable, measurable, and tested against reality, we'd love to hear from you. #Hiring #AIEngineer #MachineLearning #LLM #AgenticAI #FoundingEngineer #ArtificialIntelligence #StartupJobs #Python #RAG