Principal Security Software Engineer

Last updated 5 days ago
Location:Redmond, Washington
Job Type:Full Time

The Security Assurance & Vulnerability Research team is looking for a talented engineer to build innovative and efficient vulnerability research tools that will help secure Windows products and Microsoft devices.

The Security Assurance & Vulnerability Research team is one of the teams responsible for securing the Windows client and server operating systems, used by billions of customers every day, along with Microsoft devices such as Xbox, HoloLens, and Surface. This team develops vulnerability research tools, exploit mitigations, performs security design reviews, and penetration testing on key Windows features and devices to make sure they meet the highest possible security standards.


In this role, you work on a team of security engineers to develop vulnerability research tools, research and develop methods to eliminate vulnerabilities at scale, develop new security mitigations, and work with teams to refactor and update high risk code bases. The ideal candidate will have hands-on experience writing C/C++, a clear understanding of OS security fundamentals, strong computer science skills, and a passion for keeping Microsoft customers safe.

Primary requirements/responsibilities:

  • Build vulnerability research tools to enable security researchers to work more efficiently
  • Research and build new security mitigations to eliminate vulnerabilities at scale
  • Automate existing work to run at scale with minimal user interaction
  • Ability to learn new skills and operate in a fast-paced and changing environment
  • Excellent written and verbal communication skills



  • Excellent written and verbal communication skills
  • 6+ years of C/C++ development experience
  • 4+ years systems programming experience


  • Experience delivering software and specialized tools to security-focused organizations
  • 2+ years of compiler development experience

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.

Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you need assistance and/or a reasonable accommodation due to a disability during the application or the recruiting process, please send a request via the Accommodation request form.

Benefits/perks listed below may vary depending on the nature of your employment with Microsoft and the country where you work.