Join a high-growth startup building an AI-native platform to accelerate revenue teams. As the first engineering hire, you will own core product features and infrastructure from day one. Working alongside founders who have previously scaled AI ventures, you will build and ship fast-moving systems to real users while shaping the company culture.
Back to all jobs
Find a job withJack
This job is no longer actively hiring. Open Roles to see active jobs.
London, United Kingdom£70-100k + Equity
Founding Software Engineer at VC-backed AI startup
Ready to build the future of AI-driven revenue? We are looking for a Founding Engineer to join a well-funded London startup as the first technical hire. You will own the core platform, ship fast to real users, and hold significant equity in a company backed by top-tier VCs and iconic founders. If you are an ML-fluent full-stack engineer who thrives in high-intensity environments, this is your shot at a career-defining role. Join us and shape the architecture of a platform designed to make teams 10x more efficient.
Overview
Role overview
Company
About the company
VC-backed AI revenue startup
Responsibilities
What you will do
- Design and implement core product features and full-stack infrastructure for an AI-native revenue platform.
- Build and optimize LLM pipelines and clean systems to ensure rapid iteration and scalability.
- Work directly with the founding team to translate customer needs into production-ready software.
Candidate profile
Who this is a fit for
- Experienced full-stack or ML-fluent engineer with a track record of building AI-native products or pipelines.
- Comfortable navigating high-intensity environments with significant autonomy and ambiguity.
- Obsessed with shipping high-quality code fast and building products that drive tangible revenue impact.
What makes it remarkable
Why this role is remarkable
- Significant founding equity with potential for seven-figure upside as the team scales toward Series A.
- Backed by top-tier VCs and highly successful exited founders within the European tech ecosystem.
- Direct impact on product direction, choosing the tech stack and defining engineering culture from the ground up.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack