Senior Full Stack Engineer (Backend leaning)

Job description

Senior Full-Stack Engineer (Backend-Leaning) – SaaS + AI

Join a seed-stage SaaS startup backed by leading VCs, adopting AI to redefine their product. They’re pre-PMF, mid-pivot, and need a hands-on engineer (~80% coding) to help build, define, and scale.

Comp: Up to £100k + strong early stack equity package

What you’ll do

• Full-stack engineering, backend-leaning (Next.js FE + BE, Node.js, TypeScript, legacy Python)
• Collaborate with product & CEO to shape the roadmap
• Help guide a small, senior team
• Work on AI / agentic systems integration

Setup

Hybrid: 2+ days/week in Moorgate

Small, flat team with fast decisions

If you’re a hands-on engineer who loves building SaaS products with AI, let’s chat!

Senior Full-Stack Engineer (Backend-Leaning) – SaaS + AI

Extra information

Status

Open

Education Level

Secondary School

Location

City of London

Type of Contract

Full-time jobs

Published at

03-02-2026

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English