Staff Security Engineer

Bellevue, WA Full-time Hybrid 10/26/2026 Job ID: 000507
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Offensive Security Red Team Operations Penetration Testing Threat Modeling Security Assessments

Summary

What you’ll impact

The Lead Offensive Security Engineer is responsible for planning, executing, and leading red‑team assessments and adversarial simulations to identify and mitigate security risks across applications, infrastructure, and corporate environments. The role uses Python, Go, and JavaScript scripts, leverages Kubernetes/Docker and cloud platforms such as AWS or GCP, and applies the MITRE ATT&CK framework and network protocol expertise. Responsibilities include building automated testing tools, conducting threat modeling and penetration tests, delivering remediation guidance, mentoring junior security engineers, and leading incident response to strengthen the organization’s security posture.

Responsibilities

What you'll do

  • Plan and execute security assessments across applications, infrastructure, and physical environments, and partner closely with engineering and security teams to strengthen detection and response capabilities.
  • Help prioritize risk, contribute to remediation efforts, and develop tools and techniques that improve how we test and secure our systems.
  • Your work will directly support the safety and reliability of products used by millions of customers.
  • Evangelize the Offensive Security Team’s Findings and Projects with stakeholders throughout the company and collaborate with other teams to create solutions that balance security with other priorities.
  • Mentor and provide guidance to the members of the Offensive Security team.
  • Plan and execute red team exercises, including long-term assessments that simulate real-world attack scenarios
  • Perform threat modeling and penetration testing across applications, infrastructure, and corporate environments
  • Develop scripts and tools to support and automate security testing activities
  • Partner with detection and response teams to run adversarial simulations and improve incident readiness
  • Communicate findings clearly and work with engineering teams to remediate identified risks
  • Lead Security Incidents when Pentest or Red Team findings require them.
  • Plan and participate in Adversarial Simulation exercises with various security teams.

Requirements

What you’ll bring

  • 8+ years of experience conducting red team operations or advanced penetration testing
  • Experience mentoring or supporting the development of other security engineers
  • Passion and demonstrated experience for challenging security assumptions.
  • Excellent written and verbal communication skills and ability to communicate your findings at many different levels of abstraction from Engineers to Executives.
  • Passion for fixing security issues and not just identifying security issues.
  • Familiarity with common network protocols and standards such as DNS and TCP/IP.
  • Experience with MacOS and Linux.
  • Experience with leveraging components of a modern software development stack to attack companies, including CI, container orchestration systems (Kubernetes/Docker), cloud providers (AWS, GCP), etc and be able to give hardening suggestions.
  • Experience/knowledge of defensive tools/techniques (IDS/IPS, Packet Capture, Network Analysis, AV, EDR, etc.) and how to evade them.
  • Deep understanding of Mitre’s ATT&CK Framework.
  • Strong understanding of the security fundamentals of access and identity.
  • Comfortable reading / writing python, go, and javascript.
  • Ability to research and execute a testing plan to access a new technology or process.
  • Demonstrated experience working with a distributed team.
  • Proficiency to communicate over a text-based medium (Slack, JIRA Issues, GitHub issues, & Email) and can succinctly document technical details.

Ready to Move Forward?

Apply now and our recruiting team will reach out with next steps, interview guidance, and client insights tailored to this role.