Job Description

Are you looking for a challenge that puts you at the center of the Microsoft Edge + Platform Security Fundamentals (EPSF) strategy? Are you passionate about solving the security challenges of critical online services? Are you passionate about defensive and offensive security?
Microsoft's EPSF (Edge + Platform Security Fundamentals) team is responsible for securing some of Microsoft's largest and most influential online services in the Azure Edge & Platform (AEP) organization and Windows Devices organization (W+D).The EPSF Services Pentest (SERPENT) team needs an Offensive Security Engineer to increase our business partners' security posture.
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:
EPSF Security has a world-class penetration testing team that helps ensure a secure experience for millions of users worldwide. We primarily focus on offensive security and application security and work closely with our defense teams to continually improve our operational awareness.
Job responsibilities:

• Penetration Testing: Identify security vulnerabilities and their variants in critical services using various techniques such as source code reviews, dynamic analysis, operational security assessments etc. and validate software quality following our development standards.
• Security Automation: Participate in developing static and runtime analysis capabilities to find software security bugs quickly and with high confidence. Push the cutting edge when it comes to automated analysis of managed code and modern web services.
• Research, Training, and Tool Development: Perform research to stay current with bleeding edge of penetration testing, offensive, and defensive tools, and tactics. Leverage the output of this research for training and awareness acrss EPSF Security and innovation development efforts.

Additional specifics are outlined as follows.

• Strong hands-on programming experience in C# (.NET Framework and .NET Core), Python, Go, or other comparable languages, with the ability to build custom security tools and automation workflows.
• Knowledge of Securing AI Systems or Having worked on pentesting AI systems.
• Experience customizing and writing rules for SAST tools, such as CodeQL or Semgrep, Expert-level proficiency with Burp Suite, including advanced features, automation, custom extensions, and fuzzing techniques
• Strong expertise in identity and access management (IAM), including OAuth, OpenID Connect, Entra ID applications, authentication and authorization flows, service principal configurations, and proficiency in identifying misconfigurations and potential exploit scenarios
• Solid understanding of secure development practices, including threat modelling, secure coding standards, vulnerability remediation techniques, supply chain security risks, and CI/CD pipeline misconfigurations
• Experience with Azure cloud platforms, including cloud infrastructure security and misconfiguration management
• Familiarity with AI and machine learning security concepts is a plus, including risks such as prompt injection, model poisoning, data exfiltration, and adversarial attacks, as well as strategies for securing AI-powered applications
• Excellent collaboration and communication skills with a proven track record of working across cross-functional teams

Qualifications:

• BS or MS in Computer Science, a related field, or equivalent experience

• Strong coding skills

• 4+ years of experience in identifying security vulnerabilities in online services through penetration testing

• Strong background in customizing static, dynamic, and runtime analysis tools.

• Solid verbal and written communication skills.

• Solid teamwork and cross-group collaboration skills.

• Ability to deal with ambiguity.

• Experience in technical disciplines outside security space, including general software development, networking, database management, and full-stack development, is a strong plus.

• Demonstrated coding skills in one or more popular languages and platforms such as: C#, Java, Python, and others.

• Bachelor of science or master's degree in computer science, software engineering, information security or equivalent work experience.

• CISSP, OSCP, OSWE,GCIA, or SANS certifications is a plus.

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. 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 .

Skills Required