Senior Full Stack Engineer - React/TS/Node - £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.

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.

• 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

• 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
• Frontend: React, TypeScript, Next.js

• 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