Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Provide tools, telemetry, and optimizations to drive measurable improvements in critical user performance metrics for ad rendering and display. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python, ensuring adherence to high coding and performance standards. Develop monitoring systems (RUM and Synthetic) to track reliability and viewability metrics, and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Participate in code reviews, knowledge sharing sessions, and help implement technical standards and best practices within the team.