About the job
Founding Engineer (Unity Mobile)
Pax Historia is revolutionizing gameplay by leveraging cutting-edge generative AI technology. Our innovative platform seamlessly combines the intricacies of grand strategy with the limitless creativity of a sandbox environment, all while being energized by a dedicated community that actively creates and remixes scenarios.
Our community is vibrant, publishing hundreds of scenarios daily and engaging in millions of gameplay sessions each week, with rapid growth on the horizon. Supported by prominent investors such as Y Combinator, Pace Capital, and Z Fellows, your contributions will directly impact a product enjoyed by hundreds of thousands of players.
The Role
We are seeking a founding-level Unity developer to spearhead the development of our native mobile application. This role requires full-time, in-person work in our San Francisco office located in Dogpatch, where you will collaborate closely with the co-founders.
Current Position Overview:
- A web-based game with significant product-market fit, particularly within the alternate-history genre.
- Hundreds of thousands of users are eagerly anticipating a native mobile experience.
- A well-documented TypeScript codebase with clear data models and API patterns for integration.
- No existing Unity codebase; you will be architecting the system from the ground up.
Your Key Responsibilities:
- Developing the core gameplay loop for iOS and Android, including features such as an interactive map, action submissions, event viewing, and AI-driven chat.
- Creating a high-performance 2D map rendering system capable of displaying thousands of regions with smooth panning, zooming, and animated territorial changes.
- Building a consistent UI component library that aligns with our web design system (custom components, Poppins typography, dark/light modes).
- Integrating with our Firebase/Supabase backend and AI services through REST APIs.
- Implementing push notifications and deep linking to enhance user engagement.
- Optimizing the application for lower-end mobile devices and memory-constrained environments.
In summary, your contributions will propel Pax Historia into the mobile realm and unlock our next phase of growth.

