Principal Software Engineer, Build Platform — AI at Scale

Roblox is seeking a Principal Software Engineer for the Build Platform in San Mateo, CA. You will shape the architecture behind AI-powered creation, oversee long-running workflows, model routing, tool and skill execution, and the safety, cost, and observability aspects of the platform. You will lead with hands-on technical leadership, drive collaboration across teams, and define scalable systems for millions of creators. The role is based at Roblox HQ in San Mateo with onsite work requirements.