Senior Full Stack Engineer - React/TS/Node - £80-100K
Oliver Bernard · London Area, United Kingdom
About this role
The candidate will take ownership across the full stack, designing APIs, data models, and high-performing user interfaces. You will work closely with product and design teams to build tools for private investors to manage their portfolios. The technical environment includes React, TypeScript, Next.js, Node.js, GraphQL, Postgres, and AWS. This is an early-stage, AI-native fintech startup focused on the intersection of finance and sustainability. The role offers a hybrid working model with three days per week in the London office.
Skills & technologies
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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
