Founding Engineer - LLM Infra & Platform
About the role
Founding engineer role focused on building and owning Pax Historia's AI provider infrastructure, reliability, caching, routing, and monitoring to support ~240 billion weekly tokens across 37+ models for 60k+ daily active users. In-person in San Francisco; visa sponsorship available; meaningful equity.
Responsibilities
- Own provider reliability, structured outputs, caching, routing, and monitoring.
- Ensure 37+ models reliably handle ~240 billion weekly tokens.
- Reduce costs and latency for 60k+ daily active users.
- Collaborate with team to maintain scalable LLM infrastructure (no model training responsibility).
Qualifications
- Strong fundamentals in systems design, data-oriented mindset, high attention to detail and verification.
Skills
Benefits
- Meaningful equity reflecting responsibility as a founding engineer.

About Pax Historia
The first AI-powered grand strategy platform
Pax Historia is an alternate-history sandbox game where players choose a country, a moment in time, and rewrite the course of history. What if Rome never fell? What if the Soviet Union survived? What if Genghis Khan ruled for another generation? We go beyond history, too. What if aliens invaded Earth? What if you were a college dropout creating a tech startup? The ability to create, edit, and copy custom maps, actors, historical context, and more means that users can play nearly any scenario they can imagine. In the last four months we've organically built a passionate fanbase of tens of thousands of daily active players and we're excited to expand on this early start. Consider joining us to help build vastly better tools for creators and experiences for players.
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