Founding AI Agent Engineer

ABOUT THE ROLE Join an early-stage healthtech company building conversational AI to support patient recruitment for clinical trials. As a founding engineer on the AI team, you will own production agents that help patients learn about and connect with relevant trials, with a strong focus on scale, reliability, and safety. WHAT YOU'LL DO - Build and orchestrate AI agents that coordinate patient recruitment across clinical trials. - Review production conversations, identify failure scenarios, develop evaluations, and use results to improve the agent harness. - Integrate health profile data sources to help agents reach patients at appropriate times and support trial screening. - Scale language model experiences across voice, SMS, and email while maintaining consistent, personalized conversations. - Evaluate emerging agent tools and research, incorporating relevant capabilities into the software platform. WHAT WE'RE LOOKING FOR - Zero to four years of experience as a software engineer, agent engineer, or applied AI engineer, with substantial focus on agents or large-scale AI applications. - Experience building conversational agents and agent harnesses for real users at scale, beyond prototypes or internal tools. - Experience developing evaluation and tracing infrastructure for AI agents. - Familiarity with LLMs, multi-agent orchestration, LangGraph, Vercel AI SDK, voice AI, SMS APIs, and CTMS or CRM integrations. - Strong computer science, mathematics, or related fundamentals, typically supported by an undergraduate degree in a related field. - Self-directed, persistent, and effective at solving ambiguous engineering challenges. Healthtech experience or interest and consumer AI product experience are valued. - Authorized to work in the United States without visa sponsorship, able to work on-site in the San Francisco Bay Area, and available to start within four weeks. COMPENSATION & BENEFITS Base salary: $150,000 to $220,000 annually. Visa sponsorship is not available. LOCATION On-site in the San Francisco Bay Area, California, United States.