Founding Engineer - LLM Infra & Platform

Pax Historia
San Francisco
Workplace: OnsiteFull timeUSD 130,000 - 220,000 annuallyFunction: Entrepreneurship & Venture BuildingSkills: ["Detail-oriented","Data-oriented","Strong fundamentals","Verify work","Fast learner","Ownership"]

Own the infrastructure that powers Pax Historia’s LLM-driven platform—ensuring requests are routed reliably across many AI providers. Build and improve structured outputs, caching, routing, and monitoring to reduce latency and cost for a high-volume user base. You’ll focus on reliability for 37+ models handling tens of billions of monthly tokens, collaborating closely with the team while shipping scalable platform improvements.

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Pax Historia
Pax Historia
3 days ago

Founding Engineer - LLM Infra & Platform

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Source: Company careers pageValidated by: Fursa AI
Last checked: 22 hours agoStatus: Live

Job Summary

Own the infrastructure that powers Pax Historia’s LLM-driven platform—ensuring requests are routed reliably across many AI providers. Build and improve structured outputs, caching, routing, and monitoring to reduce latency and cost for a high-volume user base. You’ll focus on reliability for 37+ models handling tens of billions of monthly tokens, collaborating closely with the team while shipping scalable platform improvements.
Location: San Francisco
Workplace: Onsite
Employment Type: Full time
Job Function: Entrepreneurship & Venture Building

Key Responsibilities

  • •Own the system that sends huge numbers of requests across many AI providers and returns the right response quickly, reliably, and cheaply.
  • •Improve provider reliability, including handling structured outputs across many models.
  • •Build and maintain caching, routing, and monitoring to optimize reliability, latency, and cost.
  • •Ensure 37+ models reliably handle the platform’s 30B+ monthly tokens at scale.
  • •Work with the team to reduce costs and latency for 60k+ daily active users wherever possible.

Pay and Benefits

Salary: USD 130,000 - 220,000 annually
Equity and Bonus:Equity
Perks:Equity

Key Requirements

  • •Have strong fundamentals and a fast-learning mindset for building reliability-focused infrastructure systems.
  • •Be highly detail-oriented and data-oriented, with a strong tendency to verify everything.
  • •Ensure 37+ models can reliably handle Pax Historia’s scale of tokens and production usage.
  • •Demonstrate capability to reduce latency and costs while maintaining reliability across providers.
  • •Strong ownership skills expected for a founding engineer role.
Experience:AILLMInteractive entertainment
Skills:Detail-orientedData-orientedStrong fundamentalsVerify workFast learnerOwnership
Tech Stack:LLMStructured outputsCachingRoutingMonitoringAI providers

Eligibility

Work Authorization:Sponsorship available.

Company Brief

Pax Historia
Pax Historia is a digital media brand creating accessible history content—articles, podcasts, and multimedia—that engages audiences with historical narratives, analysis, and storytelling for education and general interest.
Industry: Digital Media
Company Size: Micro (1 to 10 employees)
Website