This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jack's network

The next step is to speak to Jack.

Founding Engineer

Salary: £80k–£110k + Equity

Company Description: Xylo – AI-powered operating system for local government

Job Description:
As the Founding Engineer at Xylo, you will tackle a trillion-dollar problem by building AI-powered tools that modernize local government planning. Working directly with co-founders, you will ship features end-to-end using a modern stack including React, Supabase, and LLMs, transforming how councils deliver critical housing and infrastructure projects across the UK.

Location: London, UK

Why this role is remarkable:

• Join a mission-driven founding team with elite backgrounds in software engineering, venture capital, and climate tech to solve a global housing crisis.

• Own the technical foundation and culture of a startup that is already shipping products used by local planning officers to automate complex research.

• Enjoy a high-autonomy environment where your code reduces manual workload for government officials within days of shipping, creating tangible societal impact.

What you will do:

• Build and deploy new features end-to-end, from initial concept through to full production deployment using React, TypeScript, and Supabase.

• Collaborate directly with customers to iterate on AI-driven products like Core and Patch, ensuring high accuracy through domain frameworks and human-in-the-loop evals.

• Shape the engineering culture and technical architecture while leveraging LLMs to automate research, validation checks, and report generation for local councils.

The ideal candidate:

• 4+ years of professional full-stack experience with a proven track record of shipping 0 to 1 products in fast-paced startup environments.

• Highly product-focused with a deep curiosity for user problems and an interest in applying AI/LLMs to solve complex, real-world public sector challenges.

• Comfortable with ambiguity and ownership, ideally possessing an unconventional background or a history of taking meaningful career risks to build impactful technology.

Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI Career Agent 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.

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.

Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.