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Principal Security Software Engineer

Microsoft

$163,000 - $331,200
Oct 17, 2025
Redmond, WA, US
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Microsoft Azure is at the center of Microsoft’s cloud services strategy and the future of Microsoft. Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. 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 Azure Customer Experiences (CXP) organization is on a mission to convert Azure customers into Azure fans. We want to ensure that our first- and third-party offerings adhere to the security standards, and that our products uphold the promise we have to our customers and partners.

Requirements

  • coding in languages including, but not limited to, C, C++, C-Sharp, Java, JavaScript, or Python
  • 6+ years of experience working in security and services at an enterprise level.
  • 6+ years of experience working security principles and architectures, including, but not limited to, the principles of least privilege, least common mechanism, economy of mechanism, and others.
  • 6+ years of experience working with technologies and mechanisms to achieve compute isolation, network isolation, authentication and authorization, and auditing and alerting.
  • Deep understanding of network protocols, firewalls, VPNs, and intrusion detection/prevention systems (IDS/IPS).
  • Deep understanding of distributed systems, cloud architectures, networking, and AuthN/AuthZ systems to allow you to spot vulnerabilities across the stack.
  • Demonstrate deep threat modelling expertise including experience in identifying attack vectors and creating comprehensive threat models.

Responsibilities

  • discover, diagnose, analyze, quantify, characterize and help drive solutions for the most challenging security problems in CXP through a data-driven, product-driven lens.
  • advance security by working with other Security Engineers, Program and Product Managers, and Developers, as well as business leaders throughout Microsoft to turn individual findings and vulnerabilities into patterns and insights that can be measured and managed through engineering, automation, and other appropriate mitigations.
  • identify the most demanding security problems through original research and data analysis and help design and deliver practical solutions at scale for select products and services.
  • work up and down the stack, across platforms, operating systems, languages, and frameworks, using your broad security skills to solve problems in unfamiliar domains.
  • demonstrate deep threat modelling expertise including experience in identifying attack vectors and creating comprehensive threat models.
  • Works with product teams within CXP in collaboration with security team to examine chosen target systems in detail, looking for vulnerabilities and weaknesses, and, in collaboration with other penetration testing and red teams around the company, demonstrates the value of an “assume breach” mentality.
  • Stays on the forefront of emerging threats which affect cloud services through collaboration and original research, including proactive security research on the technologies that Azure and our customers utilize and depend on.

Other

  • 3 days / week in-office
  • Travel 0-25%
  • Effective communication skills, including proposing and reporting to executive leadership
  • Proven ability to influence cross-org stakeholders without direct authority
  • Relevant certifications such as CISSP, CCSP, or equivalent