Full-Stack Founding Engineer (+ Equity) at Early-stage AI startup

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.

Full-Stack Founding Engineer

Company Description: Early-stage AI startup

Job Description:
As the first engineering hire, you will lead the evolution of an AI-driven prototype into a production-ready platform. You will translate business vision into technical architecture using TypeScript, React, and Node.js while managing custom agent infrastructure. This is a high-agency role for a technical leader looking to build a foundation from the ground up.

Location: London, UK

Why this role is remarkable:

• Significant equity position as a core member of the founding team in a high-growth sector.

• High-impact leadership opportunity to own the entire technical roadmap and build out the engineering function.

• Collaborative environment based in a vibrant East London tech hub with a 4-day in-office culture.

What you will do:

• Transition an existing prototype into a scalable, production-grade product using modern web technologies.

• Architect and manage custom backend systems and sophisticated AI agent infrastructure.

• Serve as a technical partner to the founders, making critical decisions on architecture and product strategy.

The ideal candidate:

• Expert-level proficiency in TypeScript, React, Node.js, and building complex backend architectures.

• Proven track record of high agency and the ability to translate product vision into technical execution.

• Experience or strong interest in AI agent infrastructure and scaling early-stage technical products.

Who are Jack & Jill?
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.

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.