Principal Software Engineer Job at Microsoft Corporation (Redmond)

Principal Software Engineer

Microsoft Corporation

Location:
United States , Redmond

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

139900.00 - 274800.00 USD / Year

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Job Description:

We are looking for a Principal Software Engineer to join our team! We are the team that defines how users interact with Copilot in Microsoft 365. Our charter is to build foundational UX systems that make Copilot feel intelligent, responsive, and deeply integrated into the flow of work. We own the core interaction surfaces and frameworks that power Copilot’s presence across endpoints -- Teams, Outlook, M365.com, and Office apps. This includes the Shell, Navigation, Input, Sessions, Feedback and Settings, as well as proactive and assistive UX patterns. We operate as a vertical and horizontal team, partnering across product, design, and engineering to deliver consistent, high-quality experiences at scale. Our work is grounded in telemetry, user research, and a relentless focus on performance, accessibility, and craft. We’re looking for a full-stack engineer to help shape the future of AI-powered productivity experiences in Microsoft 365. You’ll join a team building intuitive, performant, and accessible user interfaces that connect millions of users with the power of Copilot.

Job Responsibility:

Define unified, scalable, modular, and maintainable front-end architectures using client/service stacks such as React, TypeScript, Node.js, while integrating design frameworks such as component libraries to ensure globally consistent UX
Drive performance, scalability, memory efficiency, and usability initiatives across multiple surfaces, collaborating closely with partner teams
Drive initiatives aimed at increasing customer reach, engagement, and satisfaction
Lead technical design discussions and mentor engineers across the organization
Develop and drive the cross-org adoption of shared infrastructure, component libraries, and best practices
Establish governance & standards with contribution guidelines and continuous integration (CI)
Collaborate with PM, design, and engineering leaders to innovate, prototype, and advocate for novel ideas
Enable rapid design updates through tooling and abstraction layers

Requirements:

Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
Ability to meet Microsoft, customer and/or government security screening requirements are required for this role
Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter

Nice to have:

Master's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
5+ years of experience in React
Experience debugging web applications, memory and performance optimization
6+ years of experience building production-grade web applications
5+ years of experience in JavaScript, Node.js, and modern front-end and service tooling
Solid understanding of front-end architecture, performance optimization, memory management, cross-browser compatibility
Experience working in large-scale, distributed teams
Passion for user experience, craftsmanship, and clean code

Additional Information:

Job Posted:
March 21, 2026

Employment Type:

Fulltime

Work Type:

Hybrid work

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