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Principal Software Engineer, M365 Copilot Platform

Microsoft

Redmond, Washington, United StatesOn Site

Original Job Summary

About the Role

The Principal Software Engineer will lead the design and development of Microsoft’s next-generation agent runtime for the M365 Copilot Platform. This role focuses on building a unified, scalable, and extensible runtime infrastructure that powers intelligent agents across first-party (1P) and third-party (3P) surfaces.

Key Responsibilities

  • Architect and develop the next-generation agent runtime.
  • Enable rapid experimentation and safe deployment of LLM powered agents.
  • Support multi-agent collaboration across various platforms.
  • Drive scalability and extensibility at a global level.
  • Collaborate with cross-functional teams to innovate and enhance platform capabilities.

About Microsoft and the Team

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. The company promotes a culture of inclusion, growth, respect, integrity, and accountability.

Key Skills/Competency

  • Agent runtime
  • LLM
  • Scalability
  • Architecture
  • Software engineering
  • Cloud infrastructure
  • Platform development
  • Extensibility
  • Collaboration
  • Innovation

How to Get Hired at Microsoft

🎯 Tips for Getting Hired

  • Research Microsoft’s culture: Study their mission, values, and tech innovations.
  • Customize your resume: Highlight platform and LLM experience.
  • Showcase technical leadership: Emphasize architecture and collaboration skills.
  • Prepare for coding challenges: Review system design and agent-based systems.

📝 Interview Preparation Advice

Technical Preparation

Review system design fundamentals.
Study cloud infrastructure specifics.
Practice architectural system designs.
Update LLM and agent development skills.

Behavioral Questions

Describe your leadership in complex projects.
Explain conflict resolution in team settings.
How do you handle high-pressure deadlines?
Discuss a time you drove innovation.