Senior Full-Stack AI Engineer

Senior Full-Stack/AI Engineer 💰 Up to £140,000 + Equity 📍 London / Hybrid 💚 Tech-for-Good This one is special. A tech-for-good, healthtech startup already operating at serious scale. Live product, real users, real-world impact. Well-funded, plenty of runway and growing fast. The Role: Full-stack engineering role (backend-leaning) for someone who thinks like a product owner. You'll take real ownership end-to-end. From shaping what gets built to shipping it into production. Key responsibilities: Build and scale backend services and APIs across the core platformOwn features from requirements through to productionSolve performance and reliability challenges at real-world scaleInfluence product direction alongside a tight-knit engineering team Stack: TypeScript - full-stack, backend-leaning - scalable API and service design, production data systems. Ideally, you'll have strong LLM and agentic AI experience. You'll be designing, integrating and shipping AI systems into production. Evaluation, testing and safe deployment matter as much as building. You'll be a good fit if you... Have 5+ years of engineering experienceHave shipped AI products into production - LLMs and agentic systemsHave worked in a small, early-stage startup environment - had real ownershipOperated end-to-end, move fast, and want real autonomyWant to make a difference with your work Why join? Real ownership: Small team, big influence. You'll shape what gets built Work that matters: The products you ship are used in healthcare settings across the UK Growing fast: Five or more engineering hires planned this year. Brilliant culture: Refurbished office with a roof terrace and garden. Properly good benefits: L&D budget, wellbeing allowance, generous holiday, and loads more! The Package: Up to £140k base (DoE) + equityL&D budget + dedicated time to use itGenerous holiday allowanceAnnual trips and always something fun in the calendarLondon / hybrid working - must like the office environment Please note: You need to be based in London for this role and be willing to work in the office.