Justworks - Senior Security Engineer (Detection & Response)

• Justworks is looking for an experienced security engineer skilled in detection and response, who can help enhance and mature Justworks’ Security. As a Senior Detection Engineer, you’ll design, build, and maintain the detection logic that powers our platform, conduct proactive threat hunting, and drive continuous improvements across our detection and incident handling workflows. You’ll collaborate closely with IT, Engineering, Platform, and other members of the Security team to identify attacker behaviors, build high‑fidelity detections, and strengthen our defenses. • You’ll also play a key role in designing and conducting table‑top exercises, improving processes, and building automation that reduces friction and accelerates response. You’ll help explore how AI can enhance detection, hunting, and operational efficiency. • Your Success Profile • In addition, all Justworkers focus on aligning their behaviors to our core values known as COGIS. It stands for: • Camaraderie - Day to day you can be seen working together toward a higher purpose. You like to have fun. You’re an active listener, treat people respectfully, and have a strong desire to know and help others. • Camaraderie • Openness - Your default is to be open. You're willing to share information, understand other perspectives, and consider new possibilities. You’re curious, ask open questions, and are receptive to thoughts and feedback from others. • Openness • Grit - You demonstrate grit by having the courage to commit and persevere. You’re committed, earnest, and dive in to get the job done well with a positive attitude. • Integrity - Simply put, do what you say and say what you'll do. You’re honest and forthright, have a strong moral compass, and strive to match your words with your actions while leading by example. • Integrity • Simplicity - Be like Einstein: “Everything should be made as simple as possible, but no simpler.” • Simplicity • 5+ years of hands-on 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 • Strong communication skills and comfort working cross‑functionally in a fast‑paced environment • This role is based in our New York City headquarters. The base wage range for this position will be $167,500 - $235,000 annually. • #LI-SD1 #LI-Hybrid • Actual compensation is based on multiple factors that are unique to each candidate, including and not limited to skill set, level of relevant experience, and specific work location.  Salary ranges for positions based in other locations may differ based on the cost of labor in that location. • For more information about Justworks’ Total Reward Philosophy, including all of the perks and benefits we are proud to offer our team members, please visit Total Rewards @ Justworks. • Diversity At Justworks • Justworks is committed to maintaining a workplace where diversity of identity, culture, and life experience is the norm and is celebrated authentically and respected consistently. Diversity in our work, our people, and our product drives creativity and innovation, entrepreneurial leadership and integrity, competitiveness, and collaboration throughout our business and in the market. We depend on our differences to make our team stronger, our workplace more dynamic, and our product accessible to all of our customers.