New 
Principal Software Engineer
 Microsoft | |
 United States, Washington, Redmond | |
 Jul 02, 2025 | |
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OverviewWe are looking for a Principal Software Engineer to join our Microsoft Defender for Office team (MDO)! We are responsible for delivering a cloud-based email and message filtering service that protects customers from advancedthreats (malware, phish, fraud and spam) in Microsoft's email and Teams collaboration workloads. MDO provides investigation,threat huntingand remediation capabilities that allow security teams to efficiently identify, prioritize, investigate, and respond to threats. Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world a safer place for all. We want to reshape security and empower every user, customer, and developer with a security cloud that protects them with end to end, simplified solutions. The Microsoft Security organization accelerates Microsoft's mission and bold ambitions to ensure that our company and industry is securing digital technology platforms, devices, and clouds in our customers' heterogeneous environments, as well as ensuring the security of our own internal estate. Our culture is centered on embracing a growth mindset, a theme of inspiring excellence, and encouraging teams and leaders to bring their best each day. In doing so, we create life-changing innovations that impact billions of lives around the world.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.
ResponsibilitiesDesign, implement and test features and functionality in our Microsoft Defender for Office to ensure M365 customers have all the capabilities they need to protect their users on teams while also hunting for and remediating threats to their tenants. Adhere to great Safe Deployment Practices (pre-production testing, blast radius reduction, early detection of issues and rollback of changes). Work across geographic and organizational boundaries to define requirements, scope work, develop features, integrate functionality, and meet key performance goals.Hands-on engineer who delivers high quality code that is maintainable, performant, testable and used in cross products Conduct efficient design and architectural discussions, ensuring that solutions are secure, reliable, maintainable, and highly performant. Lead and facilitate technical discussions, encouraging contributions from all team members and fostering an inclusive environment where ideas can be shared without judgment. Collaborate closely with multiple partner teams to ensure seamless integration and delivery of complex projects. Drive effective project management and delivery within a fast-paced, results-oriented environment. | |