Meta’s Javascript Platform team owns the core JavaScript type checking and execution infrastructure that powers the majority of Meta’s web and mobile applications. The Flow team develops and maintains Meta’s static type checker for JavaScript, enabling safe, efficient development for thousands of engineers across Facebook, Instagram, Threads, and VR/AR products. The Hermes team builds Meta’s JavaScript engine, optimized for React Native, delivering performance improvements and enabling new capabilities on mobile and emerging platforms. As a manager, you will lead teams of experienced engineers specializing in programming languages, compilers, and runtime systems. You will drive technical innovation in type systems and JavaScript execution, collaborate closely with product teams and open source communities, and deliver high-impact improvements to developer productivity and application performance across Meta’s ecosystem.