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Principal Software Engineering Manager - M365 Copilot App

United States, Mountain View 139900.00 - 274800.00 USD / Year · Job Posted January 05, 2026
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Job Description

AI is transforming productivity in profound ways. As the new home of Office productivity, the M365 Copilot App (M3CA) is at the forefront of this transformation. It is one of the fastest growing products at Microsoft, and the primary means through which most M365 users experience the power of Copilot – be it Chat, Search, or Agents. M3CA is a multi-platform product, built for consumer-grade experiences and enterprise-grade trust. Our team is responsible for all aspects of engineering for this ecosystem of applications and services. As a Principal Software Engineering Manager - M365 Copilot App, you will lead a team to develop and improve the Copilot application across Windows, Mac, and Web platforms. You will work through Engineering Managers to lead architectural decisions and help your team make sound technical choices to build applications, balancing innovation with platform stability. You will work closely with your Engineering Managers and Product counterparts to take ideas through design, implementation, validation, and release. You will plan investments for your organization, assign work to teams, and help them manage execution of projects. You will help foster a fast paced, collaborative environment to design, prototype, implement, and ship features. You will partner across multiple product and platform teams in Microsoft and define reusable architectural patterns and techniques that enable consistent and intelligent user experiences at scale. You will mentor engineers and foster a culture of technical capabilities in architecture, performance profiling, and cross-platform design systems. You will attract and hire top engineering talent. You will provide engineering leadership to the team taking on technical issues inherent in building and delivering a consumer-grade application that powers cross-platform AI experiences.

Job Responsibility

  • Guides partnership with appropriate stakeholders (e.g., project manager, technical lead) to determine user requirements within and across teams.
  • Guides teams and leads identification of dependencies and the development of design documents for a product, application, service, or platform.
  • Optimizes, debugs, refactors, and reuses code to improve performance and maintainability, effectiveness, and return on investment.
  • Guides team to drive multiple group's project plans, release plans, and work items in coordination with appropriate stakeholders.
  • Guides team and monitors other engineers across product lines, working on-call to monitor system/product/service for degradation, downtime, or interruptions.
  • Oversees product development and ensures products are scaled according to customer requirements, implementing appropriate techniques to address scaling and performance objectives.
  • Embody our culture and values.

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, Swift, or Python OR equivalent experience.
  • 4+ years experience developing, shipping, and maintaining one or more large scale Windows, Mac, or Web applications.
  • 3+ years experience managing a skilled team, growing and nurturing talent, and hiring top engineers.
  • Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings: 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, Swift, 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, Swift, or Python OR equivalent experience.
  • 3+ years experience planning, leading, and executing projects, as well as delivering impactful results.
  • 3+ years experience resolving customer feedback and improving product quality.

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