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Senior Offensive Security Researcher - Android Chromium Sandbox Security

External
Trenchant logoTrenchant · Worldwide
Full-timeOn-site2mo ago
AndroidPython
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About the role

We are seeking an expert offensive security researcher to conduct advanced vulnerability research and security testing focused on Chromium/Chrome on Android, with an emphasis on sandbox security. The role centers on identifying high-impact flaws across process isolation, IPC surfaces, and privileged service, and producing rigorous technical analysis, high-quality reproducers, and actionable remediation insights.

Responsibilities

  • Perform deep vulnerability research in Chromium (Android) with focus on sandbox and isolation failures.
  • Identify vulnerabilities and security weaknesses in:
  • o Sandbox policy and broker interfaces
  • o Mojo IPC surfaces (interface misuse, validation gaps, lifetime/ownership issues)
  • o Browser process services and privileged components
  • o Chrome-on-Android integration layers (JNI, service interactions, Android-specific glue code)
  • Develop minimal, reliable reproducers and PoCs
  • Conduct exploitability and impact analysis
  • Build and maintain research tooling:
  • o fuzzing harnesses and targets
  • o crash triage automation, repro minimization, regression testing
  • o patch diffing and variant analysis workflows
  • Track upstream Chromium security-relevant changes and help assess risk and priority across versions.
  • Required Qualifications:
  • Strong track record in finding security vulnerabilities in large C/C++ codebases (Chromium-scale preferred).
  • Solid understanding of Chromium architecture on Android:
  • o multi-process model (renderer/browser/GPU/network/service processes)
  • o sandbox model and privilege separation concepts on Android
  • o Mojo IPC concepts (interfaces, bindings, serialization, validation, object lifetimes)
  • Hands-on experience with ARM64 Android debugging and analysis:
  • o crash triage, root cause analysis, minimizing repros
  • o familiarity with modern hardening constraints (ASLR, CFI variants, PAC/BTI where relevant)
  • Proficiency in C/C++ and a scripting language (Python preferred) for automation/tooling.

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