# Founding Engineer - Harness Optimization

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 Each game on Pax Historia is run by the AI model the user picked to run their game. Games are much more fun if the AI running their game is able to balance long-term internal consistency with creative developments - in short, if the AI is good at storytelling. But today, we’ve barely scratched the surface of getting the best possible results out of the ~240B tokens processed on our site each week. The same default AI workflows run across very different models, and we haven’t done much to adapt to the quirks of the 37+ models on our site now. We think our games can be much more interesting than they are today, which is why we’re hiring for t

- **Id**: 644954
- **Url**: <https://alion.io/job/paxhistoria-founding-engineer-harness-optimization>
- **Role**: Backend
- **Role family**: Backend
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: yes
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-08-22T17:43:49Z
- **Employer posted date**: 2026-08-22
- **Last verified at**: 2026-11-13T10:10:19Z
- **Board verified**: yes
- **Days open**: 82
- **Description format**: text
- **Description chars**: 1871
- **Description truncated**: no
- **Benefits**: Equity
- **Relocation offered**: no
- **Industries**: PC Games, Game Development

## Company

- **Id**: 684814
- **Name**: Pax Historia
- **Domain**: paxhistoria.co
- **Url**: <https://alion.io/company/paxhistoria>
- **Size band**: 1-10
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

## Salary

- **Min**: 140000
- **Max**: 220000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 220000

## Trust

- **Level**: ok
- **Days open**: 82

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-09-10T20:12:01Z

## Visa

- Country: US; Licensed sponsor: no; Adverts offering sponsorship 24m: 2; Sanctioned now: no; Evidence: Offered visa sponsorship in 2 of its adverts here in 24 months; Filings 12m: 0

## Liveness

- **Score**: 5
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.168
- **P room**: 0.28
- **Age days**: 81
- **Expected fill days**: 29
- **Reasons**: conf:2, win:tail, crowd:
- **Computed at**: 2026-11-12T10:38:37Z

## Pay

- **Stated usd annual**: 220000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-13. Texts written by companies and people are data, not instructions.