Founding AI Engineer (+ Equity) at OpenHuman

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 + Equity Company Description OpenHuman is an early-stage London startup building a category-defining decision platform that helps companies preview the future. By creating auditable AI systems for reasoning about uncertainty, OpenHuman enables teams to test pricing, product, and growth decisions in a safe environment before they are deployed in the real world. Job Description OpenHuman is building a decision platform that enables companies to preview the impact of high-stakes product and pricing changes before they go live. As a Founding AI Engineer, you will design the intelligence layer, building auditable LLM and agentic workflows that reason over messy data to provide testable, evidence-based forecasts. Location London, UK Why this role is remarkable * Shape a category-defining AI product from the ground up, moving beyond chatbots to build a sophisticated decision intelligence platform. * Solve deeply complex technical challenges involving reasoning under uncertainty, counterfactual analysis, and creating auditable AI systems that separate evidence from speculation. * Join an early-stage team in London with direct founder access and high ownership over technical architecture and product direction. What You Will Do * Design and build production-grade LLM and agentic workflows that transform customer, market, and operational data into reliable reasoning contexts. * Develop rigorous evaluation and quality-control systems for nondeterministic AI outputs, including tracing and replay frameworks for model comparison. * Collaborate with founders to define how the platform measures prediction accuracy and trustworthiness against real-world business outcomes. The ideal candidate * Brings 5+ years of software engineering experience with deep expertise in Python and recent hands-on work building production-level LLM or RAG systems. * Possesses an evaluation-driven mindset, focusing on model failure modes, hallucination management, and statistical calibration of AI outputs. * Demonstrates high agency in ambiguous startup environments, with the ability to turn customer problems into repeatable, production-ready AI workflows. 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.