System1 is building the next generation of AI Agent–powered consumer products, and we’re looking for a Lead AI Product Engineer to help lead the effort. You’ll design, build, and operate our most ambitious AI agent systems from early prototypes through production, owning core architecture, reliability, and performance as these products scale. This is a high-impact, hands-on engineering role for a builder who can move quickly from concept to working systems, shipping, iterating, and hardening real agent workflows that deliver consumer value at scale. This role sits at the intersection of multi-agent orchestration, agentic coding, and production engineering, offering the opportunity to work on cutting-edge AI while directly influencing real-world product outcomes and business performance. You do not need prior experience with every protocol or framework listed below—we value strong systems thinking, production experience, and the ability to learn fast in emerging domains.