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Senior Software Engineer

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Microsoft Corporation

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

The OneFuzz team is part of Microsoft’s Security Fundamentals R&D organization, focused on advancing automated security testing through fuzzing. Our mission is to empower developers to identify and remediate vulnerabilities early by providing a scalable, integrated fuzzing platform. Key priorities include: Fuzzing Infrastructure Development: Maintain and evolve OneFuzz, an open-source, cloud-based fuzzing service for continuous security testing. Workflow Integration: Embed fuzzing into CI/CD pipelines to reduce friction and improve security posture. Security Research & Innovation: Explore new fuzzing techniques (coverage-guided, grammar-based) and integrate them into OneFuzz. Reliability & Operational Excellence: Ensure high availability, robust monitoring, and incident response for the service.

Job Responsibility:

  • Drive development of Microsoft’s cloud-based fuzzing platform to enable scalable, integrated security testing
  • Designing and implementing core fuzzing infrastructure for performance and reliability
  • Building CI/CD integrations to streamline developer workflows
  • Advancing fuzzing techniques through research and production-ready features
  • Ensuring service reliability with robust monitoring and incident response
  • Collaborating across teams and contributing to the open-source community

Requirements:

  • Strong programming skills in languages like Python, C#, or Rust
  • Experience with distributed systems or cloud services (Azure preferred)
  • Solid understanding of software engineering fundamentals and secure coding practices
  • Ability to work in collaborative environments and deliver high-quality code

Nice to have:

  • Familiarity with fuzzing technologies, vulnerability research, or security testing
  • Experience with CI/CD pipelines and DevOps practices
  • Knowledge of containerization (Docker/Kubernetes) and scalable service design
  • Contributions to open-source projects or community engagement in security tooling

Additional Information:

Job Posted:
February 04, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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