Senior Full Stack Engineer - React/TS/Node - £80-100K

Senior Full Stack Engineer – React/TypeScript/AWS – £80–100k We are partnering with a well-funded startup that is building an innovative platform empowering private investors to manage their portfolios. As an AI-native platform on an exciting growth journey, they are seeking Full Stack Engineers to help shape their architecture as they scale. The Role You’ll take ownership across the full stack - from designing APIs and data models to crafting seamless, high-performing user interfaces. Working closely with product and design teams, you’ll help bring to life tools that make investing smarter, more transparent, and more sustainable. What you’ll bring 5+ years of experience building production web applications Solid experience with React, TypeScript, and Node.js Familiarity with Next.js and GraphQL Previous startup experience A passion for clean code and intuitive product design Interest in fintech's Nice to Haves Comfortable working with tools like Postgres, Prisma, GraphQL, or Next.js Hands-on experience with AI or agent frameworks (such as LangChain or LangGraph) Experience building something from scratch — whether a side project, startup, or open-source app Tech Stack Frontend: React, TypeScript, Next.js Backend: Node.js, GraphQL Database & Cloud: Postgres, AWS Why Join? Opportunity to contribute to a mission-driven product at the intersection of finance and sustainability Work within a collaborative, high-performing team where individual input is valued Play a key role in an early-stage company where contributions directly influence success Competitive salary (£80–100k) Hybrid working model - 3 days per week in the London office Senior Full Stack Engineer role - 3 days/week in London - £80-90k