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Principal Security Researcher

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Microsoft Corporation

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Location:
United Kingdom , Cambridge

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

Security 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.

Job Responsibility:

  • Identifying potential threats, allowing for proactive defense before an actual incident
  • Building proof-of-concept, prototype, and production-ready threat hunting tools, automations, and new capabilities
  • Driving product and tooling improvements by conveying learnings from threat hunting and incident response at scale to engineering partner teams
  • Monitor, maintain, and iterate on proprietary solutions that enable our team to threat hunt
  • Implement security controls of relevant mitigations to defend against current and future threat landscape
  • Contribute across teams in producing extensible, testable, and maintainable code
  • Strong problem-solving skills, a passion for quality, and the ability to manage ambiguity, short timelines, and changing priorities

Requirements:

  • 5+ years experience in software or systems development lifecycle and cybersecurity OR bachelor’s degree in computer science or related field
  • Professional experience with developing automation with at least one of the following: PowerShell, Python, Bash
  • Professional experience with Azure technology including but not limited to
  • EntraId, Azure Front Door, Networking, ARM Deployment, Logic Apps, Functions, Automation, Storage, Alerting
  • Microsoft Cloud Background Check

Nice to have:

  • 7+ years experience in software development lifecycle and cybersecurity OR master’s in computer science or related field
  • Proven knowledge of security fundamentals across Microsoft platforms (Client, Server, Cloud)
  • Familiarity and understanding of SQL or Kusto Query Language (KQL) queries (or experience with large database/SIEM query languages such as Splunk/Humio/Kibana, etc.)
  • Familiarity and understanding of Jupyter Notebooks, or building equivalent threat hunting automations with scripting languages
  • Experience with sophisticated threat actor evidence including familiarity with typical Indicators of Compromise (IOCs), Indicators of Activity (IOAs) and Tools, Techniques and Procedures (TTPs)
  • Microsoft Azure platform knowledge and experience
  • Familiar with various forensic log artifacts
  • Familiarity with Microsoft security products stack
  • Familiar with Windows, Linux, and/or macOS forensic analysis
  • Technical/Investigation/Cybersecurity/Digital Forensics/DFIR certifications

Additional Information:

Job Posted:
March 19, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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