Founding Engineer (TypeScript/AI)

Founding Engineer | Seed-stage AI SaaS (£100k + equity)

If your skills, experience, and qualifications match those in this job overview, do not delay your application.

We’re hiring for a seed-stage SaaS startup backed by Balderton (near £5m raised) that’s using AI to fundamentally redefine its product.

The company is pre-PMF and mid-pivot, at a genuine inflection point, and looking for a hands-on engineer (~80% coding) to help shape the product, architecture, and technical foundations from the ground up.

Compensation

Up to £100k + meaningful equity

What you’ll be doing

• Full-stack engineering (backend-leaning): Next.js (FE + BE), Node.js, TypeScript, with some legacy Python
• Working closely with the CEO & product to shape roadmap and direction
• Building alongside a small, senior team (3 engineers) with true peer ownership
• Iterating fast
• Shipping real-world AI / agentic systems, not proof of concepts

Setup & culture

• Hybrid: xwzovoh 2+ days per week in Moorgate
• Small, flat team — low ego, high agency
• Fast decisions, high trust, minimal processes

If you love building SaaS products with AI and want founding-level ownership, we should talk

Founding Engineer | Seed-stage AI SaaS (£100k + equity)