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:

163000.00 - 296400.00 USD / Year

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Job Description:

Microsoft is at the forefront of a new era in productivity, and Microsoft 365 Copilot is redefining how we build and deliver AI experiences. We are a small, focused team within MSAI Office of the CTO (OCTO) committed to driving Copilot Agility — accelerating how we innovate, build, and scale the Copilot platform across Microsoft. We are looking for a Principal Software Engineer who combine deep technical experience in backend, data, and ML systems with a passion for agility and impact. In this role, you will design and lead the development of scalable systems and tools that accelerate Copilot engineering velocity across E+D (M365 Core, OPG, GXP, etc). You’ll work closely with partners across product, data, and infrastructure to drive scalable-impact projects such as the Copilot Data Platform, while mentoring engineers and influencing technical direction across teams. You’ll be working in an AI-native team, leveraging AI tools throughout the software development lifecycle.

Job Responsibility:

Lead architectural design and discussions for core systems and platforms that improve the agility, performance, reliability, and efficiency of Copilot development
Drive identification of dependencies and development of technical design documents across products, applications, and services to ensure coherence and scalability of Copilot platform solutions
Define and implement quality strategies — mentoring others in test planning, validation, and success criteria to ensure resilient and scalable-quality software and service delivery
Establish and apply engineering metrics to drive quality, stability, and maintainability, while promoting established practices and reusable design patterns
Lead the creation and improvement of internal tools and frameworks that enhance developer velocity, automation, and overall system effectiveness
Collaborate closely with engineers, technical program managers, and partner teams across product, infrastructure, and research to deliver enterprise-grade solutions adopted at scale across E+D and Microsoft
Embody our culture and values.

Requirements:

Bachelor'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 equivalent experience
6+ years experience designing and leading large-scale, distributed backend, data, or ML systems in production environments
Demonstrated ability to set technical direction, influence architecture, and mentor engineers to deliver scalable, maintainable, and scalable-quality systems
Experience driving cross-team engineering initiatives, balancing hands-on contributions with strategic technical leadership
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:

Experience working with SOTA AI tooling to accelerate software development lifecycle
Proficiency in data platforms or ML pipelines supporting AI-driven applications
Experience defining and tracking engineering metrics — including performance, reliability, observability, and agility
Solid understanding of developer productivity tooling and practices that reduce cycle time and increase development velocity
Proficient communication and collaboration skills, with the ability to influence at multiple organizational levels
Passion for continuous improvement, technical innovation, and enabling teams to build better software faster
Commitment to Microsoft’s values of integrity, inclusion, and a growth mindset.

Additional Information:

Job Posted:
January 29, 2026

Employment Type:

Fulltime

Work Type:

Hybrid work

Microsoft Corporation - All Job Offers

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