Senior Software Engineer - M365 Copilot App

Microsoft • Redmond, WA

143d • $119,800 - $234,700

About The Position

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 of people around the world. You'll shape and evolve the frontend foundations which enable teams across Microsoft - including Create, Copilot Notebooks, and Copilot itself - to deliver seamless, intelligent productivity solutions. As a Senior Software Engineer - M365 Copilot App, you'll lead the development of portable, scalable, and performant frontend patterns and strategies that help evolve the Microsoft ecosystem and drive AI value. You'll collaborate with engineers, designers, and researchers to bring high-performing, inclusive, and scalable experiences to life. This role offers a unique opportunity to influence the core infrastructure that supports AI-powered productivity and to grow your expertise in frontend architecture at a global scale.

Requirements

• Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
• 4+ years of experience in frontend architecture, performance engineering, or scalable web application development.

Nice To Haves

• Proven expertise in modern frontend technologies including React, Typescript, and with a track record of delivering performant, accessible, and scalable experiences in production.
• Data‑centric approach to engineering that integrates usage analytics and experimentation into planning, design, and iteration to drive measurable business impact.
• Customer obsessed and passionate about product impact.
• Ownership of a complex frontend system or framework such as a microfrontend orchestration layer or a high-scale web experience with strict performance SLAs, delivered in production and adopted across multiple teams or products.
• Ability to elevate engineering culture and practices through initiatives that led to measurable improvements in performance, platform adoption, or developer productivity across teams or organizations.
• Grounded in growth mindset, and advocate for diversity and inclusion.

Responsibilities

• Design and implement scalable, high-performance frontend systems using React, Typescript, microfrontends, and modern rendering stacks to power AI productivity experiences across M365 Copilot App.
• Partner across Microsoft, including teams like Create, Copilot Notebooks, and Copilot, to evolve a shared frontend platform and define reusable, portable architectural patterns and best practices that enable consistent, intelligent, and high-performing user experiences at scale.
• Lead architectural decisions and contribute hands-on code to advance the state of the art in frontend engineering, balancing innovation with platform stability.
• Apply a data-driven approach to performance, leveraging real-world telemetry, experimentation, and diagnostics to continuously optimize responsiveness, accessibility, and reliability.
• Mentor engineers and foster a culture of technical excellence through best practices in frontend architecture, performance profiling, and cross-platform design systems.

Benefits

• Industry leading healthcare
• Educational resources
• Discounts on products and services
• Savings and investments
• Maternity and paternity leave
• Generous time away
• Giving programs
• Opportunities to network and connect

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Industry: Professional, Scientific, and Technical Services
• Education Level: Bachelor's degree