Founding Backend Engineer

From the original posting

San Francisco ABOUT THE ROLE Own the backend systems behind an AI assistant that communicates through text, email, and phone. As a hands-on founding engineer, you will design, build, and operate reliable infrastructure for message delivery, long-running agent tasks, and scheduled actions. WHAT YOU'LL DO - Design and operate messaging pipelines with reliable ordering, retries, and delivery across communication channels. - Build an agent runtime for background tasks, managing concurrency, timeouts, cancellation, and recovery from model or tool failures. - Implement scheduling for future…