---
title: "Founding Engineer - LLM Infra & Platform"
company: "Pax Historia"
company_url: "https://www.remjobs.works/companies/pax-historia"
url: "https://www.remjobs.works/job/pax-historia-founding-engineer-llm-infra-platform-1030c058-1965-4867-bee7-5a35bb44493d"
apply_url: "https://jobs.ashbyhq.com/pax-historia/50aaa303-32cd-422f-9ef6-f3ffa278e411"
workplace: onsite
location: "San Francisco"
employment_type: full-time
seniority: founding
role: ai-machine-learning
region: united-states
skills: ["llm"]
salary: "$140,000–$220,000 per year"
date_posted: 2026-08-22T01:21:01.446Z
first_seen_by_remjobs: 2026-09-04T18:42:18.366Z
---

# Founding Engineer - LLM Infra & Platform

**Pax Historia** · San Francisco

Salary: $140,000–$220,000 per year

Apply: https://jobs.ashbyhq.com/pax-historia/50aaa303-32cd-422f-9ef6-f3ffa278e411

## About Pax Historia

Pax Historia is an AI powered sandbox game where players create and upload whatever worlds they can imagine for others to play. What if Rome never fell? 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.

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.

## About the role

**Company**

Pax Historia is creating the future of interactive entertainment.

We’re building the platform for worldbuilders, storytellers, and game devs to create and publish any ‘what if’ they can think of. So far, most of the 25k+ user published presets on our site are historical (eg, ‘what if Rome never fell?’), but fantasy and sci fi are the fastest growing categories on the site.

We have seen over 92 million rounds played and raised a 10M+ seed round in March. We’re backed by Y Combinator (W26), Bessemer, Pace Capital, Z Fellows, and more.

**Role**

Every game on Pax Historia depends on our ability to send huge numbers of requests across many AI providers and get the right response back quickly, reliably, and cheaply.

We’re hiring an engineer to own that system. You’ll work on provider reliability, structured outputs, caching, routing, and monitoring. At the end of the day, you will need to:

- Ensure that the 37+ models on our site reliably handle our 30 billion+ monthly tokens.

- Reduce costs and latency for our 60k+ daily active users wherever possible.You will *not* be in charge of model-training. We do not run model inference ourselves.

If you’re obsessed with detail, data oriented, and have a strong tendency to verify everything, then this might be a great fit for you. We don’t expect you to have done this exact job before, but we are expecting you to be a fast learner with extremely strong fundamentals.

**Logistics**

You’ll be our 7th team member. We work in-person in San Francisco, 5+ days/week. We are open to sponsoring visas.

Comp will include meaningful equity to reflect your responsibility as a founding engineer.

---

Source: Pax Historia's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/pax-historia-founding-engineer-llm-infra-platform-1030c058-1965-4867-bee7-5a35bb44493d