Founding AI Engineer

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. Job Title Founding AI Engineer Salary Not Disclosed Company Description Kantrip is a $2.75M pre-seed startup co-led by Arcadia Gaming Partners and 20VC building an AI-native game engine in TypeScript. Based in London, they are redefining the $150bn mobile gaming industry by creating an agent system that transforms a simple game idea into a fully shipped product on the App Store. Job Description You will own the agent system that transforms a game spec into a shipped product. Working at the intersection of AI and gaming, you'll build the routing layer, evaluation tooling, and custom runtimes to automate game development. This is a high-intensity founding role based in-person in Central London, offering true system ownership. Location London, UK Why this role is remarkable Build the world's first AI-native game engine using TypeScript, the language AI writes best, and ship games directly to the App Store.Join a high-caliber team backed by $2.75M from top-tier VCs like 20VC and Arcadia Gaming Partners, plus industry legends like Christopher Chedeau.Gain massive ownership by building the core infrastructure that turns LLMs into a viable, automated game development pipeline with custom runtimes. What You Will Do Design and operate the complete pipeline from initial specification to shipped build, covering planning, code generation, review, and automated release.Develop internal evaluation and regression tooling to automatically measure output quality and catch failures within the agentic development loops.Build a custom routing layer and retrieval system to optimize model selection based on quality, latency, and cost for every generation step. The ideal candidate Proven experience building multi-step LLM production pipelines, tool-using agents, or sophisticated evaluation infrastructure in a professional or high-stakes environment.Strong systems engineering background with deep proficiency in TypeScript or another high-level language and a passion for testing new model frontiers.Thrive in high-intensity, founder-level environments and enjoy working in person five days a week from a central London office. 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. 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. 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.