Senior Product Engineer

Role: Senior Product Engineer (Fullstack)Salary/Package: £90k-£140k + Equity OptionsCompany Sector: AI Start UpExperience Level: Senior (5+ years)Tech: JavaScript, TypeScript, Node.js, React.js, AWSLocation: Central LondonWorking Arrangement: 5 days a week in the office (flex hours) Product Engineer (Full Stack)Help shape the future of human–computer interaction by building fast, delightful, intelligent products.We’re looking for a product-focused engineer who loves bringing ideas to life in a fast-moving, collaborative environment. You’ll work across the stack to design, build, and launch new features - the kind that make users go, “Whoa, that’s smart.”This role is ideal for someone who thrives in early-stage environments, loves zero-to-one product building, and enjoys taking full ownership from concept to delivery.What you’ll doBuild new user-facing features end-to-end - from idea to productionExperiment rapidly with prototypes and iterate based on user feedbackOptimise for performance, scale, and reliabilityCollaborate closely with engineers, designers, and product leads to craft elegant, high-impact solutionsWhat you bringStrong experience building full-stack web applicationsProficiency with TypeScript, Node.js, and React (experience with tools like Tailwind, Radix, or Framer Motion is a plus)Solid understanding of Postgres or similar relational databasesExposure to cloud infrastructure (AWS or similar; Terraform a plus)A genuine interest in AI and emerging technologiesWho you areA builder at heart - you love shippingExcited to work in-person from a central London officeEnergised by startup pace and ambiguityPragmatic, kind, and ambitious in equal measureDriven by creating meaningful user experiencesWhy this roleThis is a chance to join an early team shaping the next generation of productivity tools. You’ll work hands-on with cutting-edge AI and help define both the product and the culture from the ground up.My client offers above-market compensation (salary and equity) and relocation support for those joining us in London.If this sounds like you, even if your background doesn’t tick every box we’d love to hear from you.

Created: 2026-01-18