Principal Software Engineer

Security & OS Feature Engineering  

• Design and implement Windows security and enterprise capabilities that ship at scale across client and/or server.  
• Build features across foundational areas such as hardware-backed security, cryptography, identity/authentication, and enterprise management experiences.   

Engineering Excellence (Quality, Reliability, Operability)  

• Produce robust, testable, maintainable code with strong engineering rigor, including diagnostics and operational readiness suitable for global rollout.  
• Partner with security and platform stakeholders to ensure designs align to secure-by-default principles and meet compliance/assurance expectations.   

Cross-team Collaboration & Delivery  

• Collaborate with ENS partner teams in Redmond and across Windows engineering to deliver shared roadmaps and aligned technical outcomes.  
• Drive end-to-end execution: requirements → design → implementation → validation → deployment, with an ownership mindset.   

AI Forward Engineering  

• Leverage AI assisted and agentic engineering workflows to accelerate design, debugging, testing, and documentation—while maintaining strict verification and security quality bars.   
• Establish reusable patterns (e.g., prompt/playbook snippets, validation checklists, automation hooks) that make AI usage repeatable and safe for the team.   

Improve engineering efficiency by applying AI to:  

• Root cause analysis and debugging.
• Test generation and validation strategy. 
• Automation to reduce recurring toil.

Required/Minimum Qualifications:

• Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python.
  • OR equivalent experience.
• Solid experience building and shipping production software in one or more systems languages (e.g., C/C++/C#/Rust) and debugging complex systems.  
• Experience in one or more: platform security, cryptography, identity/authentication, secure boot/TPM, device security, enterprise policy/management, licensing/entitlement systems.  
• Experience designing and developing features in large-scale, performance-sensitive systems, ideally with Windows / OS / systems depth.  

Preferred Qualifications:

• Public Key Cryptography/Post Quantum Cryptography(PQC).
• Track record of driving engineering quality: testing strategy, telemetry, reliability, and operational excellence.  
• Comfort partnering across geographies and influencing designs with stakeholders across engineering, security, and program leadership.  

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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. 

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.