Join one of the UK's fastest-growing startups as an early engineering hire reporting directly to the CEO. You will build and ship production-ready AI features that help over 1.5 million monthly users learn anything through gamification. This role focuses on implementing LLM features and evaluation frameworks using TypeScript to scale a product with $5M ARR.
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AI Engineer at Gizmo
Gizmo is building the "Duolingo for anything," and they're looking for an AI Engineer to help 1 billion people learn. Reporting to the CEO, you'll ship production LLM features and build evaluation frameworks at scale. If you're a TypeScript pro with a bias for impact, this £170k + equity role in Shoreditch is your next big move.
About this role
Role overview
About the company
Software
Gizmo is an AI startup on a mission to make learning so easy that anyone can learn anything. We're building Duolingo for Anything - a platform that uses gamification and social mechanics to make learning fun. With over 1.5 million monthly active users and $5M in annual recurring revenue, we’re already one of the fastest-growing startups in the UK. Backed by leading investors, we recently raised $22M in Series A funding to accelerate our vision of helping 1 billion people learn.
What you'll do
What you will do
- Design and implement production AI features using advanced prompt engineering with the latest LLMs into a high-performance TypeScript backend.
- Build and maintain robust LLM evaluation frameworks to systematically assess model performance and improve system accuracy.
- Collaborate in a small, high-calibre engineering team to own features end-to-end, from initial design through to global deployment.
Who you are
Who this is a fit for
- An experienced software engineer with over 7 years of professional experience and deep proficiency in TypeScript and backend systems.
- Practical expertise in AI/LLM integration, including production experience with LLM APIs, prompt engineering, or model evaluation techniques.
- A self-starter with a maker mindset and previous startup experience who thrives in autonomous, fast-paced environments where shipping is prioritized.
Why this role
Why this role is remarkable
- Join a high-growth startup that recently raised a $22M Series A to help 1 billion people learn through AI-driven cognitive science.
- High-impact opportunity reporting directly to a CEO with ML expertise, shaping the product roadmap for millions of active users with minimal process.
- Work at the bleeding edge of Generative AI, deploying the latest models like GPT-5 and Gemini to solve the universal problem of boring education.
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?
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.