Principal Software Engineer - M365 Copilot App

Who you are

You have a strong background in software engineering with a focus on building applications across multiple platforms — your experience spans Windows, Mac, and Web environments, allowing you to create seamless user experiences. You are adept at writing secure, reliable, and scalable code, and you understand the importance of test automation and telemetry in production environments. Your leadership skills shine as you mentor engineers, fostering a culture of technical excellence and collaboration within your team.

You possess deep expertise in programming languages such as Java and C# — you've successfully led architectural decisions and contributed hands-on code to complex projects. Your ability to balance innovation with platform stability is crucial, as you work to enhance the M365 Copilot App, one of Microsoft's fastest-growing products. You thrive in collaborative environments, partnering with cross-functional teams to define reusable architectural patterns that enhance user experiences at scale.

Your experience includes performance profiling and cross-platform design systems — you are comfortable navigating the challenges of multi-platform development and are committed to delivering high-quality software solutions. You have a passion for mentoring and developing the technical capabilities of your team, ensuring that everyone grows and succeeds together.

Desirable

Experience with AI technologies and their application in productivity tools would be a plus, as you will be working on a product that leverages AI to transform user experiences. Familiarity with agile methodologies and modern software development practices will also enhance your effectiveness in this role.

What you'll do

As a Principal Software Engineer for the M365 Copilot App, you will lead the design and implementation of features that enhance productivity for millions of users — your role involves taking ideas from concept through to release, ensuring that each feature is robust and user-friendly. You will collaborate closely with other engineers, product managers, and designers to create innovative solutions that meet user needs.

You will be responsible for defining architectural patterns and techniques that enable consistent and intelligent user experiences — your insights will guide the team in making informed decisions about technology choices and implementation strategies. You will also engage in hands-on coding, contributing to the development of the Copilot application while ensuring that best practices are followed throughout the software development lifecycle.

In addition to your technical responsibilities, you will mentor junior engineers, helping them to develop their skills and advance their careers — fostering a culture of learning and collaboration is essential to the success of your team. You will also participate in code reviews, providing constructive feedback to ensure high-quality code is maintained across the project.

What we offer

Microsoft offers a dynamic work environment where innovation is encouraged and supported — you will have the opportunity to work on cutting-edge technologies that are shaping the future of productivity. The company values diversity and inclusion, creating a workplace where everyone can thrive. Competitive compensation and benefits packages are provided, along with opportunities for professional development and career advancement.

Join us at Microsoft and be part of a team that is transforming how people work and collaborate — your contributions will have a direct impact on the user experience of millions of M365 users worldwide. We encourage you to apply even if your experience doesn't match every requirement, as we value diverse perspectives and backgrounds.