Senior Software Engineer

Job Description

Senior Full-Stack Engineer – Rapid AI Features on Vercel (London, UK)

Are you ready to turbocharge your career at a high-growth UK FinTech startup?

We’re looking for a Senior Full-Stack Engineer to architect and ship game-changing AI features at lightning speed—with an unbeatable experience building on Vercel.

You’ll be hands-on with our Next.js / TypeScript frontend and Python / FastAPI backend, and you’ll collaborate closely with our AI team to integrate cutting-edge LLMs and multi-agent systems.

If you thrive on rapid iteration, technical ownership, and shaping engineering culture from the ground up, this is your chance to make a real impact1.

Why you?

• AI at speed : Build, deploy, and scale AI-powered features with top-tier Vercel experience.
• Startup energy : Work in a fast-paced, venture-backed environment where your ideas shape the product.
• Ownership : Drive technical decisions and mentor a growing team.
• Modern stack : Next.js, React, TypeScript, Python, FastAPI, PostgreSQL, Vercel (V0 & AI SDK), GCP.
• Perks : £90k+ equity, hybrid London, flexible hours, unlimited holiday, hardware budget.