Senior Software Engineer in London

Senior Software Engineer – YC‐Backed StartupLocated in London. This founding team role offers £90 K–£120 K plus equity.

I\’m working with an exciting YC‐backed startup in London that\’s just closed a multi‐million‐pound funding round and is looking for a Senior Software Engineer to join their founding engineering team.

Despite being early‐stage, they\’re already punching well above their weight – with paying customers onboarded and serious traction in their market. This is a rare opportunity to get in at the ground floor of something special.

Responsibilities

Working directly alongside the founders to build and scale the product

Taking real ownership over technical decisions and architecture

Shaping the engineering culture and technical direction from day one

Building features that directly impact paying customers

Tech Stack

Python

TypeScript

React/Next.js

Benefits

3 days per week in their London office (hybrid working)

Direct impact on product and company direction

Work with world‐class founders backed by Y Combinator

Qualifications

Strong commercial experience with Python and TypeScript

Experience with React/Next.js or similar modern front‐end frameworks

Someone who thrives in fast‐paced, early‐stage environments

A builder who wants ownership, not just tickets to complete

If you\’re a senior engineer looking to step into a founding team role at a startup with genuine momentum, let\’s talk.

Location & Employment

London, United Kingdom

Full‐time, Mid‐Senior level

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