Pax Historia ยท 2 weeks ago
Founding Engineer (AI / ML)
San Francisco, CA
Full-time
Onsite
Senior Level, Lead/Staff
$150K/yr - $240K/yrPax Historia is defining a new category of gameplay using the latest advancements in generative AI. They are seeking a founding-level ML systems engineer to build and run infrastructure that optimizes AI model performance for their gaming platform.
Computer Games
No H1B
Responsibilities
Build and run the infrastructure needed to rigorously tailor harnesses and prompts to each AI model individually to squeeze out maximum performance
Train domain-specific models to close or even eliminate the gap between open and closed models in their weight class at playing Pax
Reduce costs associated with closed source models by optimizing caching strategies
Further improve performance of closed source models by training tuned endpoints
Evaluate and improve embedding and reranker performance in the places we use them
Enable entirely new user experiences based on upcoming world models
Qualification
Required
You have shipped ML systems to real users and operated them in production
You have made explicit cost/quality tradeoffs in deployed systems
You have debugged and fixed unexpected model failures in production (e.g. expert hot-spots, structured output errors, etc)
You have designed, critiqued, or iterated on evaluation frameworks and understand their failure modes
You bias toward leverage and compounding improvements (better evals, better feedback loops, better infrastructure)
You are willing to work on the 'boring' but important problems like instrumentation, data hygiene, debugging, and reliability
You take ownership of problems and are comfortable advocating for your ideas (while remaining open to evidence)
You know when to say 'no' to yourself and us when something isn't worth the complexity or risk
Preferred
Experience with preference modeling, pairwise ranking, or human-in-the-loop evaluation systems
Background in games, simulations, storytelling systems, or other domains where qualitative judgment matters
Experience operating systems at high request volume
Prior work at an early-stage startup or as a founding engineer
Benefits
Selected candidates can expect to receive 0.25% - 1+% equity.
Vesting schedule is a 12 month cliff and 4 year monthly vesting.
We will also be offering a non-matching 401k plan.
Company
Pax Historia
Pax Historia is a next-generation strategy game where players step into history and shape the world through diplomacy, negotiation, and bold decisions.
Founded in 2024
2-10 employees
Funding
Current Stage
Early StageCompany data provided by crunchbase