Software Engineer II & Senior Software Engineer

Job ID: 200040313Posted: 2026-06-12Location: United States, Washington, RedmondSalary: USD $102,100 - $202,200 per yearEmployment type: Full-TimeWork site: 3 days / week in-officeRole type: Individual ContributorTravel: Less than 25%Profession: Software EngineeringDiscipline: Software EngineeringCompany: MicrosoftOverviewSecurity 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.Attacks begin on the endpoint—it’s where an intruder first lands, runs malware, and moves laterally across a network. It’s also where their activity can be observed most clearly in real time.The Microsoft Defender for Endpoint (MDE) client for macOS runs directly on our enterprise customers’ Macs, continuously monitoring processes, files, and system events. It blocks threats on the device and transforms what it observes into high-fidelity signals that power investigation and response across Microsoft Security. Operating across diverse macOS versions and large enterprise fleets—without negatively impacting device performance—is a complex systems challenge.The agent runs close to the operating system using system extensions and the Endpoint Security Framework, integrating deeply with the macOS security model to extend and enhance the protections our customers already rely on.We are looking for a Software Engineer II and a Senior Software Engineer who are passionate about building fast, reliable, native systems software and want to shape a macOS product that protects enterprise environments against real-world attacks. Our team's engineers have the opportunity to influence technical direction, own the architecture of major features and subsystems, and elevate the engineers around them.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.ResponsibilitiesWe transform high-volume process, file, and security events across macOS into a fast, accurate, and durable account of activity—forming a foundation for Microsoft Security. In this role, you will:Build and improve detection, OS event monitoring, telemetry, and reporting in the on-device agentDevelop native components that detect and respond to real-world endpoint threatsDesign, deliver, and maintain components with a focus on reliability, performance, and operational healthHelp ensure the agent remains efficient, safe, and aligned with the macOS security modelContribute to performance, concurrency, and compatibility across macOS versionsProduce high-quality telemetry that supports investigation, analytics, and security insightsInvestigate and resolve issues such as crashes, performance regressions, and compatibility challengesApply secure coding practices and validate assumptions to build resilient systemsCollaborate with engineers and partner teams to deliver integrated security solutionsContribute to design discussions, code reviews, and shared engineering practicesEmbody our culture and values.QualificationsRequired Qualifications Bachelor's Degree in Computer Science or related technical field AND 2+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or PythonOR equivalent experience 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. Preferred 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 PythonOR equivalent experience.4+ years building and shipping systems-level or native software in C/C++ or Objective-C Experience with macOS, Linux, or other Unix internals: system extensions, the Endpoint Security Framework (ESF), kernel/user-mode boundaries, or equivalent low-level OS work Background in security, endpoint protection, EDR/antivirus, networking client software (e.g., VPN), or performance-sensitive systems software Experience with multithreaded/asynchronous code and diagnosing concurrency or performance issues Interest in security, systems programming, or endpoint detection and response #MSFTSecuritySoftware Engineering IC3 - The typical base pay range for this role across the U.S. is USD $102,100 - $202,200 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 $133,800 - $219,200 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: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 $160,200 - $261,000 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.Microsoft is an equal opportunity employer. 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 with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.