Founding Engineer

Do you have experience working at an early-stage startup and want to do it again, properly this time? Are you excited by real ownership, commercial impact, and building something genuinely category-defining? 🚀 Founding Engineer (Product-Led 'Generalist') – AI-native Workspace 🚀 💰 Salary: £120k - £160k + equity 📍 Location: London, Onsite 🧠 Experience: 3-8 years (startup / founding engineer background preferred) We’re partnered with a pre-seed AI startup building agentic AI systems that radically improve how knowledge workers think, decide, and get work done. This is not another chatbot. This is an AI-native product being built from first principles by engineers from elite technical environments (e.g. Palantir, Citadel). They’re now looking for a Founding Engineer, someone who’s: Already been a founding / early engineer orWorked in a fast-moving, high-growth startup and understands what it takes to ship real product, fast, with users in mindHas a generalist mindsetA strong mathematical background You’ll work directly on: Core agent loops (prompting, tool selection, model choice, memory & context)High-performance, real-time LLM-powered UXMaking autonomous systems reliable enough for daily, mission-critical work As a Founding Engineer, you’ll wear many hats: Backend: PythonFrontend: TypeScript, ReactAI/LLMs everywhere (Cursor/Copilot as a daily workflow)Architectural decisions & trade-offsProduct thinking & UX judgmentTalking to users and rapidly iteratingFull SDLC ownership; build, ship, break, fix, repeat What they’re looking for: Strong commercial & product mindset – you care about outcomes, not just codeComfortable in ambiguity and zero-to-one environmentsProven ability to ship fast in small teamsAI-native way of working (LLMs are tools, not toys)Resilient, adaptable, and genuinely excited by hard problems Why join now? Real ownership — technical and productSmall, elite team that ships fastWell-funded with long runwayYou’ll help define a product shaping the next generation of softwareNot another boring B2B Saas… this is something you’d actually use If you’re ready to step into a true founding-level role, influence the product direction, and build something genuinely new, this is the one. Interested? Apply now! 🚀