Founding Engineer

Senior Engineer (£90k-£120k) - Greenfield Platform Build

This is a senior, high-trust engineering role for someone who wants to build core systems properly, not inherit legacy or operate inside rigid delivery structures.

You'll be joining a small, engineering-led team at an early stage, working on a greenfield platform with long-term technical ambition. The focus is on building reliable, scalable software that will sit at the heart of a complex product.

This is not consultancy work and not feature factory delivery.
You'll have genuine ownership over how systems are designed, built, and evolved.

What you'll be doing

Designing and building core backend services and APIs

Contributing to architectural decisions that underpin future scale

Working across the full lifecycle, from problem definition to production

Building systems that prioritise reliability, performance, and maintainability

Collaborating closely with a small, senior team where quality matters

What they're looking for

Strong experience as a backend or backend-leaning full-stack engineer

Comfortable operating in early-stage, ambiguous environments

Experience building production systems that need to be robust and dependable

Pragmatic engineering mindset - knows when to move fast and when to slow down

Enjoys ownership, responsibility, and technical depth

Context

Early-stage, product-led business

Small, senior engineering team

High autonomy, low bureaucracy

Engineering decisions genuinely matter

London fully onsite
Uop to £120k + equity