Senior Software Engineer

Microsoft•Redmond, WA

18d

About The Position

Microsoft Defender protects individuals and enterprises from advanced cyber threats across Windows, macOS, Linux, Android, and iOS. We are expanding our tools and capabilities across product lines and seeking a Senior Software Engineer with deep expertise in C#, ASP.NET Core, HTML/CSS, and modern JavaScript to deliver secure, scalable, and intuitive experiences at global scale. By streamlining infrastructure and developer tools, the Infrastructure and Developer Platform (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 will own complex features end-to-end, influence architecture decisions, and mentor engineers while collaborating across disciplines to ship high-quality solutions that protect millions of devices worldwide. 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.

Requirements

Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to C#, ASP.NET Core, and JavaScript/TypeScript.
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 Haves

Master's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C#, ASP.NET Core, and JavaScript/TypeScript.
OR 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#, ASP.NET Core, and JavaScript/TypeScript.
Hands-on experience building reusable components and contributing to design systems.
Understanding of software engineering fundamentals, secure coding, and performance optimization.
Experience with Blazor, React, or similar frameworks.
Familiarity with Azure services (App Service, AKS, Functions, AAD).
Background in security domains or enterprise-scale applications.
Proven ability to lead projects and mentor engineers

Responsibilities

Lead design and implementation of full-stack features spanning ASP.NET Core APIs, Razor/Blazor, and standards-based HTML/CSS/JavaScript.
Define and evolve UI architecture and design patterns for enterprise-scale security solutions.
Drive engineering excellence: testing strategies, CI/CD pipelines, code reviews, and documentation.
Partner with PMs, designers, and platform teams to translate customer scenarios into technical plans.
Champion accessibility (a11y), localization, and performance best practices across UI components.
Mentor engineers on coding standards, design principles, and secure development practices.
Stay current with emerging technologies and advocate for pragmatic innovation.

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