New 
Principal Software Engineer
 Microsoft | |
 United States, Washington, Redmond | |
 Oct 29, 2025 | |
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OverviewWe are looking for a Principal Software Engineer to join the Infrastructure and Developer Platform (IDP) team within Microsoft Security, which plays a pivotal role in supporting the Defender suite by providing a foundational platform that simplifies service deployment, enhances security, and reduces operational costs. Positioned at the intersection of C#/.NET SDK development and Kubernetes, this role is instrumental in enabling AI-driven development workflows across the Microsoft Threat Protection (MTP) organization. By streamlining infrastructure and developer tools, the IDP team empowers engineers to build and scale services more efficiently and reliably. The Infrastructure and Developer Platform (IDP) team is a cornerstone of Microsoft's security strategy, delivering the essential infrastructure that powers the Defender product suite. By offering robust tools and frameworks, IDP enables engineering teams to innovate rapidly while ensuring secure, reliable, and cost-effective service deployment. Leveraging cutting-edge technologies and best practices, the platform supports seamless operations and global protection for millions of users, reinforcing Microsoft's leadership in cybersecurity. You'll help shape and deliver the paved path for secure, observable, and scalable .NET workloads on Kubernetes by:Designing SDKs and platform APIs that make secure defaults and best practices the path of least resistance.Enabling AIassisted developer experiences (code generation, linters, templates, PR automation) that increase velocity and reduce toil.Driving adoption through handson dev work plus tech talks, brown bags, and onboarding that scale best practices across Microsoft Security. 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.
ResponsibilitiesLead cross-team technical strategy and execution, defining architectural direction and ensuring alignment across multiple product and platform teams.Enable the paved path: partner with product and platform teams to publish patterns, reference implementations, and guardrails; measure adoption and impact.Own architecture and crossteam design for developer workflows (templates, CLI/VS extensions, GitOps, pipelines) that embed security, telemetry, and compliance by default.Design & implement core SDKs, libraries, and platform integrations (C#/.NET) that standardize how teams build, test, and ship on Kubernetes.Accelerate AIdriven workflows: prototype and productionize AI assistants, code generators, and automation that reduce friction in the dev loop.Developer advocacy: lead tech talks, brown bags, and onboarding sessions; create docs, samples, and internal tutorials that lower the bar for secure Kubernetes development.Ship with quality: drive testability, observability, safe rollout, and incident readiness for platform components and SDKs.Crossorg influence: collaborate with security, compliance, and platform teams to align on standards (e.g., policy, identity, supply chain security) and scale best practices.Solve complex, ambiguous engineering challenges at global scale, delivering secure and reliable solutions that impact millions of users. | |