Founding Engineer, Agent and Data Systems

Другое

• About Company
• Company (YC S26) is building the full-stack infrastructure for AI-native businesses, redefining how companies are built, launched, and scaled in the 21st century. We're a four-person, seed-stage startup hiring our fifth teammate. Our team brings together engineering, ML, and product experience from Tesla, Waymo, Amazon, UC Berkeley, and Stanford, including research published at ICML.
• The role
• We are hiring a founding engineer with end-to-end ownership across agent, data, backend, and product systems. You will engineer harnesses across our agent systems, including tool-use loops, evidence-driven learning systems, replay and simulation infrastructure, evaluation and promotion gates, and the backend and full-stack product systems that hold everything together.
• You will work directly with the founders to turn prototypes into reliable product infrastructure and shape both the technical architecture and the product.
• What you will have ownership in
• • Design and operate reliable agent harnesses, execution systems, replay and simulation infrastructure, and evaluation and promotion gates.
• • Build backend systems for orchestration, state, versioning, observability, and reliability.
• • Build data systems, including pipelines, ETL, data modeling, and warehousing.
• • Ship full-stack product features across APIs, services, and user-facing workflows.
• • Work closely with customers and the founding team to identify problems, test ideas, and ship quickly.
• What we are looking for
• • Concrete evidence of building and operating LLM-driven agent systems, beyond calling a chat API.
• • Hands-on harness engineering experience, including tool execution, evals, replay, simulation, state, and observability.
• • Strong backend and systems engineering fundamentals.
• • Full-stack product instincts and the ability to work wherever the product needs you.
• • Data engineering experience with pipelines, ETL, modeling, or warehousing is a meaningful advantage.
• • High agency and ownership. You start, ship, and improve things without waiting for detailed direction.
• • Comfort with the pace and ambiguity of a very early-stage startup.
• We care more about demonstrated ability than years of experience. Strong side projects, open-source work, publications, internships, or startup experience can all be compelling when they show relevant outcomes.
• Location and compensation
• This is a full-time, in-person role in San Francisco. We support relocation and US visa sponsorship. The base salary is $150,000 to $200,000, plus 0.5% to 1.5% equity.