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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.

We are seeking a Senior Software Engineer in the Core Authentication team in Entra ID who will play a pivotal role in shaping services that power authentications for millions of organizations running business-critical workloads, issuing hundreds of billions of tokens daily. You’ll experience what it takes to run a highly distributed, scalable service with an SLA of over four nines availability.

In this role, you will lead from the front in driving an AI-first culture, leveraging AI technologies to improve engineering efficiency, accelerate innovation, and deliver smarter solutions. You will also contribute to building a secure platform for AI agent authentication, enabling the next generation of trusted AI experiences across Microsoft and beyond.

Our team is at the center of enabling critical security capabilities such as conditional access, continuous access evaluation, token binding, credential-free authentication via managed service identities for workload identities—all core priorities under Microsoft’s Secure Future Initiative. You’ll work on industry-leading redundancy strategies to achieve availability goals and help shape the future of identity security.

This is an opportunity to have a deep, meaningful impact and touch billions of lives with your work. Our culture promotes diversity, inclusion, and multiculturalism, which are reflected in everything we do. Diversity is more than a commitment—it’s the foundation of our success. We foster accountability and provide numerous opportunities for learning and career growth.

We have exciting opportunities for you to innovate, influence, transform, inspire, and grow within our organization. If you’re passionate about security, scalability, and AI-driven innovation, we encourage you to apply and learn more!

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

• Design and develop large scale distributed software services and solutions with a focus on scalability, performance, and security.

• Drive system design by defining clear interfaces across multiple components, conducting in-depth design and code reviews, and leveraging data/telemetry to guide architectural decisions.

• Establish engineering excellence by ensuring services are modular, secure, reliable, diagnosable, actively monitored, and reusable; set standards and mentor others to adopt best practices.

• Lead AI-first initiatives by embedding AI-driven automation and efficiency into engineering workflows and fostering a culture that embraces AI for innovation and operational excellence.

• Lead quality initiatives by improving test coverage, designing robust integration and end-to-end testing strategies, and proactively identifying and resolving complex problem areas.

• Champion operational readiness by considering testability, observability, reliability, maintainability, and ensuring code meets production standards before delivery.

• Own Live Site health by troubleshooting and optimizing automation, reliability, and monitoring; drive root cause analysis and implement long-term fixes.

• Mentor and guide engineers by sharing expertise in distributed systems, fostering technical growth, and promoting a culture of innovation and accountability.

Embody our culture and values

Qualifications

Required Qualifications:

+ 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, C++, C#, Java, JavaScript,or Python

+ OR equivalent experience.

+ 3+ years of experience developing high scale, distributed systems on a cloud platform.

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:

Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.

Preferred Qualifications:

+ 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, C++, C#, Java, JavaScript, or Python

+ 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, C++, C#, Java, JavaScript, or Python

+ OR equivalent experience.

+ Understanding of authentication protocols like Oauth2, OpenID Connect etc.

+ 2+ years of experience with .NET

Software Engineering IC4 - The typical base pay range for this role across the U.S. is USD $119,800 - $234,700 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 $158,400 - $258,000 per year.

Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:

https://careers.microsoft.com/us/en/us-corporate-pay

Microsoft will accept applications for this role until November 7th, 2025.

\#MSFTSecurity, #IAM, #Identity, #Resilience, #Scale

Microsoft is an equal opportunity employer. Consistent with applicable law, 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 and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations (https://careers.microsoft.com/v2/global/en/accessibility.html) .