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Confidential company

Job listing

London, United KingdomNot Disclosed + Substantial Equity

Founding AI Engineer at Venture-backed gaming AI startup

Are you ready to build the future of gaming? Join a venture-backed startup as a Founding AI Engineer and develop SOTA agentic systems that empower the world's top game studios. This isn't just another engineering job; it's a founding role with a massive equity stake and the autonomy to design complex autonomous agents from the ground up. If you're an expert in LLM orchestration, GraphRAG, and production-grade AI, this is your chance to lead the technical evolution of an entire industry while working alongside world-class investors.

Overview

Role overview

Join as a founding member to build state-of-the-art agentic systems for the global gaming industry. You will design autonomous agents capable of complex tasks, from gameplay mechanics to analytics. This high-impact role offers significant ownership and the opportunity to define the technical frontier of AI-driven game development alongside a world-class team.

Company

About the company

Venture-backed gaming AI startup

Responsibilities

What you will do

  • Design and maintain robust agentic AI systems including planners, loops, search algorithms, and tool-use frameworks.
  • Implement advanced orchestration flows and memory systems like GraphRAG to ensure agent reliability and safety.
  • Deploy and operate agents as production services, managing containerization, performance tuning, and observability metrics.

Candidate profile

Who this is a fit for

  • Professional experience building production-ready agentic systems and pushing the frontier of LLM performance.
  • Strong software engineering foundations in Python with a focus on testing, version control, and scalable architecture.
  • A self-starting, hungry individual comfortable with the high-responsibility and long-hours environment of a founding team.

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What makes it remarkable

Why this role is remarkable

  • True founding member status with a generous equity package significantly higher than standard early-stage hires.
  • Backed by top-tier UK and US venture capital firms with a major funding milestone anticipated for early 2026.
  • Direct impact on the gaming industry by building production-ready agents already being used by world-leading studios.

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How Jack & Jill work together

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