Full Stack Engineer

Senior Full Stack Engineer (Product-Focused)London (5 days onsite) | £120,000–£150,000 + EquityWe're working with one of Europe's fastest-growing AI startups, backed by top-tier investors and preparing for their next major growth phase.They've built a product customers genuinely depend on, achieved strong commercial traction, and are now looking for exceptional engineers who want to own products end-to-end rather than simply execute tickets.This is an opportunity to join a small, high-calibre team where engineering, product thinking, and customer impact are deeply intertwined.The OpportunityThis isn't a role where requirements are handed down from product managers and engineers operate in silos.You'll work directly with users, understand problems firsthand, design solutions, write code, and measure the impact of what you've built.You'll help shape the future of a product already being used by major enterprise customers and contribute to solving complex real-world problems using modern AI systems.What You'll Be DoingBuilding and shipping full-stack features from concept through to productionWorking directly with customers to understand workflows and pain pointsDesigning scalable systems and product architectureBuilding AI-powered user experiences and workflowsCollaborating closely with founders and senior leadership on product directionMaking high-impact technical decisions in a fast-moving environmentTaking ownership of problems, not just tasksWe're Looking For4–8 years of software engineering experienceStrong full-stack development experienceExcellent TypeScript skillsExperience with modern frontend frameworks (React, Next.js or similar)Experience building backend systems (Node.js, NestJS or similar)Strong product intuition and customer empathyProven ability to operate autonomously and drive outcomesExperience working in fast-paced startup or high-growth environmentsParticularly Interesting BackgroundsFounding EngineersEarly engineering hires at VC-backed startupsFormer startup foundersProduct Engineers who have owned major customer-facing featuresEngineers who have worked closely with customers and business stakeholdersYou'll Thrive Here If YouCare about shipping products more than protecting your scopeEnjoy solving ambiguous problemsLike speaking to users and understanding real-world workflowsWant significant ownership and influencePrefer building things from first principles rather than maintaining legacy systemsAre excited by the pace and energy of an ambitious startupPackage£120,000–£150,000 base salaryMeaningful equity packageOpportunity to join at a pivotal stage of company growthDirect access to founders and decision-makersWork alongside a highly ambitious, high-performing teamIf you're the type of engineer who wants to build products, not just code features, we'd love to hear from you.