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Founding Engineer - Harness Optimization

Pax Historia· Engineering
Apply on company site
San FranciscoFull-timePosted 1mo ago

About the role

Founding engineer role at Pax Historia focused on harness optimization for AI-driven game worldbuilding and storytelling. In-person in San Francisco; equity-based compensation; visa sponsorship available. Early-stage role with broad system design, experimentation, and workflow improvements to enhance AI model performance across multiple models.

Responsibilities

  • Experiment with workflow architecture and prompts to improve game quality.
  • Develop evals to determine whether changes actually improve games.
  • Contribute as a fast learner with strong fundamentals to a founder-led team.

Qualifications

  • Experience level: Any (new grads ok)
  • Extremely experiment-driven
  • Big-picture systems-thinker
  • Storyteller at heart
  • Fast learner with strong fundamentals

Skills

Required:Workflow architecturePrompt engineeringExperimentation

Benefits

  • Meaningful equity reflecting founding engineer responsibility
Last updated Oct 25, 2026. Interested? Apply on the company site.
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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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