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Senior/Staff Attack Engineer, Rapid Response

Horizon3 AI· Engineering
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Remote$230k - $275kFull-timePosted 1w ago

About the role

Senior/Staff Attack Engineer focused on researching and productizing real-world exploitation techniques for Rapid Response and NodeZero, turning vulnerability research and attacker tradecraft into safe, repeatable automated attack capabilities to help customers validate exposure and prioritize remediation.

Responsibilities

  • Research and reproduce high-consequence vulnerabilities across enterprise networks, applications, identity systems, cloud environments, and infrastructure—including CISA KEVs, CVEs, N-Days, and Zero-Days.
  • Study attacker tactics, techniques, procedures, and campaigns observed in the wild, including tradecraft not tied to a single CVE.
  • Turn vulnerability research and real-world attacker behavior into safe, repeatable proof-of-exploit capabilities, attack paths, and automated modules for Rapid Response and NodeZero.
  • Demonstrate realistic impact—including privilege escalation, credential access, lateral movement, persistence, and data access—without unnecessary disruption.
  • Validate remediation and containment by safely retesting vulnerabilities and security controls.
  • Improve execution speed, reliability, observability, and evidence quality while collaborating with research, product, and engineering teams.

Qualifications

  • Strong Python and software engineering skills, including experience building, testing, and operating production-quality tooling.
  • Solid penetration testing, vulnerability research, and exploit-development fundamentals.
  • Hands-on experience with enterprise networks, applications, identity systems, cloud environments, or endpoint security.
  • Demonstrated ability to reproduce vulnerabilities and convert manual techniques into reliable automation.
  • Understanding of common attack chains, trust boundaries, authentication and authorization, privilege escalation, and lateral movement.
  • Ability to balance speed, safety, reliability, coverage, and actionable evidence.
  • Curiosity about how attackers exploit newly disclosed vulnerabilities and how defenders can validate exposure quickly.
  • Strong ownership, judgment, and communication skills in ambiguous or time-sensitive situations.

Skills

Required:PythonPenetration testingCloud and on-prem environmentsAutomation
Nice to have:Exploit development

Benefits

  • Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.
  • Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.
  • Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
  • Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence.
  • Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.
Last updated Oct 15, 2026. Interested? Apply on the company site.

About Horizon3 AI

Only Pentesting Platform Proven in Production

Continuously assess, fix, and verify your security posture. Securing enterprises across many attack surfaces.

PentestingSecurity PostureThreat DetectionVulnerabilitiesRisk AssessmentOffensive Security
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