Senior Software Engineer - M365 Copilot App

Are you a UX engineer passionate about crafting high-performing, scalable frontend experiences that power AI productivity? Join the M365 Copilot App team in Redmond, WA, where we’re shaping the future of AI-driven user interfaces used by millions worldwide. In this role, you’ll not only build innovative features but also design and implement performance telemetry, analyze live site metrics, and use data-driven insights to reason about performance at scale. You’ll help evolve the frontend foundations that enable teams across Microsoft—including Create, Copilot Notebooks, and Copilot itself—to deliver experiences that are fast, reliable, and intelligent. As a Senior Software Engineer - M365 Copilot App, you’ll lead the development of portable, scalable, and performant frontend patterns and strategies that advance the Microsoft ecosystem and drive AI value. Beyond building UI frameworks, you’ll take ownership of performance monitoring by integrating telemetry signals, interpreting real-world performance data, and applying those insights to guide architectural decisions. You’ll collaborate with engineers, designers, and researchers to bring inclusive, high-performing experiences to life, while influencing the core infrastructure that supports AI-powered productivity at global scale.