Senior Software Engineer
 Microsoft | |
 United States, Washington, Redmond | |
 Oct 23, 2025 | |
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OverviewSecurity 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. As a part of this role, as a Senior Software Engineer, you will be a part of the Identity for Services (ID4S) Team, part of Microsoft Entra. The mission of this team is to make it hard to get authentication and authorization wrong. We believe the tasks to get authentication and authorization right, actively preventing security incidents, and always being updated for a service should be straightforward and at the same time provide operational insights as part of the platform. As a team, we take meaningful steps daily to achieve our mission supporting developers, security operations, and administrators. Our solution is used across thousands of internal Microsoft services, and several of our components are available as open source on GitHub. Our main authentication SDK is written in .NET, and we focus on building robust, extensible APIs that minimize resource usage while maximizing security and resilience. We also embrace AI-powered workflows to accelerate development and improve efficiency. Our team is enthusiastic about exploring new ways to co-create with AI and leverage it for better engineering outcomes. There are still many challenges for us to solve to deliver on our mission, and to help us we are looking for an experienced Senior Software Engineer who thrives on building seamlessly integrated components running in high-scale services where security, resilience, memory, and performance are daily motivators. You work effectively across a large set of organizations and teams company-wide and operate with a customer-first mindset. As a team, we ensure our solution utilizes minimal resources, scrutinizes allocations, designs APIs to be configuration-driven and extensible, and collects telemetry to provide key insights for effective operations. 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* Develop and maintain authentication and authorization components for various platforms, including .NET (experience with Rust, Java, Golang, Python, Node.JS is a plus). * Collaborate with cross-functional teams such as leadership teams, product managers, service owners, and platform teams. * Make data-driven decisions using quantitative and qualitative insights. * Support service owners to ensure seamless integration and operational excellence. * Participate in code reviews, design discussions, and contribute to the overall improvement of our authentication libraries. * Explore and apply AI-assisted development practices to improve velocity and quality. Other Embody our Culture and Values | |