Principal Software Engineer
 Microsoft | |
$139,900.00 - $274,800.00 / yr
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 United States, Washington, Redmond | |
 Feb 14, 2026 | |
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Overview
Be at the forefront of Microsoft's AI transformation and help shape the future of AI-powered thinking tools used by millions across Microsoft 365. Join the Notebooks team to build AI-forward experiences that turn diverse, unstructured information into clarity, insight, and action. Our team builds Copilot Notebooks-an AI-native space for gathering information, making sense of it, and taking action-alongside OneNote, a beloved productivity app trusted by millions worldwide. Are you excited by platforms that enable highly distributed, collaborative experiences at scale? Do you care deeply about best-in-class UX, next-generation collaboration, and rock-solid fundamentals that drive real user engagement? As a Software Engineer on Copilot Notebooks, you'll play a critical role in delivering scalable, reliable, and low-latency experiences. You'll serve as the team's performance expert-reviewing feature designs through a performance lens, proactively identifying bottlenecks, and driving improvements that ensure our AI experiences feel fast, responsive, and trustworthy at scale. Microsoft's mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond. Responsibilities * Guides engineers within and across teams to produce extensible, maintainable, welltested, secure, and performant code that adheres to design specifications. * Partners with appropriate stakeholders to determine user requirements for one or more complex scenarios. * Provides technical leadership in identifying dependencies and developing design documents for a product, application, service, or platform. * Leads by example and mentors others to produce highquality code used across the company, promoting engineering excellence and longterm maintainability. * Leverages deep subjectmatter expertise of crossproduct features to collaborate with stakeholders and lead multiple products' project plans, release plans, and work items. * Holds accountability as a Designated Responsible Individual (DRI), mentoring engineers across products/solutions and participating in oncall rotations to monitor system/product/service health, including degradation, downtime, or interruptions. * Proactively seeks new knowledge and adapts to emerging trends, technologies, and patterns to improve availability, reliability, efficiency, observability, and performance, while driving consistency in monitoring and operations at scale; shares learnings with other engineers. * Embody ourCultureandValues Qualifications Required Qualifications:
Other Requirements: 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:
Preferred Qualifications:
Software Engineering IC5 - The typical base pay range for this role across the U.S. is USD $139,900 - $274,800 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled. Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations. | |