Senior Security Engineer (Detection & Response)

Responsibilities

• Build, tune, and deploy high‑quality detections across our platform
• Develop and refine detections using telemetry from EDR, threat intel, endpoint & cloud posture platforms and native AWS cloud services
• Conduct proactive threat hunting to uncover threat actor behaviors and detection gaps
• Lead security event & incident handling, including triage, investigation, containment guidance, and post‑incident improvements
• Build automation and tooling to reduce manual effort and improve detection accuracy
• Drive process improvements across detection engineering, incident response, and telemetry workflows
• Collaborate with Engineering to ensure high‑quality logging and visibility across AWS environments
• Explore and prototype AI‑assisted detection and response capabilities
• Design and conduct table‑top exercises to validate readiness and strengthen response processes
• Influence and leadership - fostering a community of knowledge-sharing, collaboration, mentorship, and forward-thinking.

Requirements

• At Justworks, you’ll enjoy a welcoming and casual environment, great benefits, wellness program offerings, company retreats, and the ability to interact with and learn from leaders in the startup community.
• You’ll help explore how AI can enhance detection, hunting, and operational efficiency.
• experience in detection engineering, threat hunting, security event analysis, and incident response
• Strong understanding of attacker behaviors, malware techniques, and modern threat landscapes Hands‑on
• experience with EDR platforms (event analysis, detections, hunting)
• Proficiency with AWS security and logging services (CloudTrail, GuardDuty, IAM, VPC Flow Logs, Lambda, etc.) •
• Experience designing and conducting attack & defend (table‑top) exercises
• Demonstrated ability to improve processes, reduce friction, and automate repetitive tasks
• Interest in how AI/ML can enhance detection, hunting, and response workflows

Experience