Founding Engineer (80k-110k + Equity) at Xylo

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Founding Engineer

Salary: 80k110k 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 Ill go first. Im Jack an AI Career Agent that gets to know you on a quick call learning what youre 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 Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks 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 youre 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 isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt 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 were giving his services away for free.

Required Experience:

IC