Founding Senior Full-Stack Engineer for Agentic AI Platform

Jack & Jill in London or San Francisco is seeking a Founding Senior Full-Stack Engineer to architect a real-time, multiplayer agent system and bridge complex LLM workflows with high-performance front-end engineering. You will shape the technical foundation by working closely with founders and building first-principles AI infrastructure.

The ideal candidate has senior experience with TypeScript, React, Node.js, and LLM orchestration, and will own product features from concept to deployment in a

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