Full-Stack Founding Engineer (+ Equity) at Early-stage AI startup

Full-Stack Founding Engineer

Early-stage AI startup

Job Description

As the first engineering hire, you will lead the evolution of an AI-driven prototype into a production-ready platform. You will translate business vision into technical architecture using TypeScript, React, and Node.js while managing custom agent infrastructure. This is a high-agency role for a technical leader looking to build a foundation from the ground up.

Location

London, UK

Why this role is remarkable

• Significant equity position as a core member of the founding team in a high-growth sector.
• High-impact leadership opportunity to own the entire technical roadmap and build out the engineering function.
• Collaborative environment based in a vibrant East London tech hub with a 4-day in-office culture.

What you will do

• Transition an existing prototype into a scalable, production-grade product using modern web technologies.
• Architect and manage custom backend systems and sophisticated AI agent infrastructure.
• Serve as a technical partner to the founders, making critical decisions on architecture and product strategy.

The ideal candidate

• Expert-level proficiency in TypeScript, React, Node.js, and building complex backend architectures.
• Proven track record of high agency and the ability to translate product vision into technical execution.
• Experience or strong interest in AI agent infrastructure and scaling early-stage technical products.