You will lead the development of AI-driven software designed to replace decades-old legacy systems in local government. By building autonomous agents and durable workflows that handle complex planning research, you’ll help clear massive housing backlogs and ensure society gets the infrastructure it needs. This is a high-impact, product-focused founding role.
Back to all jobs
Find a job with Jack
Founding Engineer at Xylo
Join a team of unicorn-alumni and seasoned founders building the next era of government software. As a Founding Engineer, you will tackle a trillion-dollar global problem by replacing 1990s legacy systems with sophisticated AI agents and durable workflows. Based in London’s AI Hub, you'll have complete autonomy to build product-led solutions that accelerate housing and climate infrastructure projects. With a salary up to £150k and meaningful equity, this is a once-in-a-generation opportunity to modernize the public sector using a cutting-edge stack including Supabase, Braintrust, and Inngest. If you lose sleep over making government work for the people, this is your role.
About this role
Role overview
About the company
Xylo
SoftwareLondon, United KingdomPre-Seed
Stealth-mode GovTech startup modernizing planning and infrastructure for the UK and US markets
What you'll do
What you will do
- Build and ship new product features end-to-end, moving from concept to deployment with extreme urgency and full autonomy.
- Develop AI agents and durable workflows that gather evidence across thousands of sources to automate complex planning task validation.
- Work directly with local government users to iterate on product direction and ensure technical decisions solve real-world pain points.
Who you are
Who this is a fit for
- A product-minded full stack engineer with 3+ years of experience and a track record of shipping 0-to-1 products in startup environments.
- Expert-level proficiency with LLMs and AI agents, specifically in deploying them to production within complex or regulated enterprise settings.
- Possesses a founder mindset and takes pride in writing clean, reliable code that improves human workflows rather than just replacing them.
Why this role
Why this role is remarkable
- Massive global impact: You will be modernizing a trillion-dollar market that directly affects housing, climate, and infrastructure projects across the planet.
- High-caliber team: Work alongside a 2x construction tech founder, former leads from Marshmallow and Cytora, and engineers with unicorn/exit experience.
- Cutting-edge stack: Deploy sophisticated AI agents and LLM-grounded workflows using a modern stack of React, TypeScript, Supabase, and Braintrust.
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 15 million jobs daily and helps you discover roles at companies like this.
How does this work?
Tell Jack what you want
He learns what great work looks like for you, then scans 15M jobs every night to find your best matches.
Reply to refine your search
React to roles in-app or by email. Jack adjusts, tracks applications, and keeps improving the more you share.
Land the role
Mock interviews, salary benchmarking, and coaching calls. Free for candidates.