Founding Engineer - LLM Infra & Platform

Pax Historia; San Francisco (CA); In loco; USD 180.000 - 260.000; Tempo pieno

Vantaggi offerti da questo lavoro

Equity

Visa sponsorship

Descrizione del lavoro

Pax Historia in San Francisco is seeking an engineer to own the system that routes requests across 37+ models and 60k+ daily users. You’ll focus on provider reliability, structured outputs, caching, routing, and monitoring to keep latency low and costs down.

We value fast learners with strong fundamentals; you won't train models, but you will verify everything, measure impact, and own reliability end-to-end in a founding-engineer capacity, with meaningful equity and visa sponsorship.

Competenze

• Must have strong fundamentals, data-oriented mindset and a penchant for verification.
• Experience improving reliability and performance of distributed systems.
• Ability to reduce costs and latency while handling large-scale traffic.

Mansioni

• Own and operate the system that routes requests across many AI providers.
• Ensure reliability of 37+ models handling 30B+ monthly tokens.
• Implement caching, routing, and monitoring to reduce latency and cost.

Conoscenze

Reliability engineering

System monitoring

Performance tuning

Data analysis

Cost optimization

Strumenti

Monitoring tools

Caching layers

Routing

Descrizione del lavoro

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.