OverviewWe''re hiring a Founding / Senior Software Engineer to join a well-funded, early-stage AI product team based in London. This is a hands-on, high-ownership role for someone who enjoys building real products from the ground up and wants meaningful influence over technical direction, architecture, and delivery.The product is already live, customer-facing, and built around applied AI rather than research. The focus is on shipping reliable systems that solve real operational problems at scale.This role suits engineers who thrive in ambiguity, enjoy working close to customers, and are motivated by impact rather than hierarchy.What You''ll Be DoingBuilding and shipping core product features using Python and TypeScriptDesigning and owning backend-leaning full-stack systemsWorking with LLMs and AI-driven workflows in productionBuilding event-driven systems and third-party integrationsTaking ownership from problem discovery through to deliveryBalancing speed vs scalability depending on contextContributing to engineering best practices around testing, reliability, and securityTech EnvironmentLanguages: Python, TypeScriptArchitecture: Cloud-native, distributed systems, event-driven designAI: Practical LLM usage in real-world productsInfrastructure exposure: Kubernetes, serverless, modern cloud platforms (experience here is a plus, not a blocker)What We''re Looking For5-10+ years'' experience in full-stack software engineering (backend-leaning)Proven experience shipping AI-powered