Senior Security Engineer - Detection and Response

Klaviyo • Boston, MA

4d

About The Position

Klaviyo is seeking a Senior Security Engineer to join its growing Detection and Response (D&R) Team. This hands-on technical role builds and maintains secure, reliable, and scalable detection and response systems that improve security observability. The engineer participates in the end-to-end detection development and response lifecycle and supports threat response operations. The role offers the opportunity to apply security and engineering expertise, provide technical thought leadership, solve complex security challenges, and improve Klaviyo’s overall security posture.

Requirements

• 5+ years of experience in software, security, and/or data engineering.
• An automation-first and AI-first approach to work.
• Experience with centralized logging, data lakes, and SIEM solutions.
• Familiarity with large-scale data pipelines and data engineering techniques.
• Proficiency in programming languages used to automate or build systems, such as Python or Go.
• Proven experience with Git/GitHub and CI/CD automations.
• Familiarity with tactics, techniques, and procedures used by threat actors.
• Experience participating in detection and response or incident response on-call.
• Strong passion for continuous learning and staying current with evolving technology.
• Strong oral and written communication skills.
• Team-oriented approach and a strong, self-managing work ethic.

Responsibilities

• Build systems that facilitate security observability for detection and response.
• Develop AI-first security systems to automate detection and response operations.
• Onboard, normalize, and optimize security logging data for large-scale analysis, detection engineering, ML model deployment, and efficient incident querying.
• Develop high-fidelity rule-based and/or ML-based detections as code.
• Respond to security alerts, cyber threats, and security incidents.
• Drive end-to-end incident response investigations.
• Automate and codify detection and response workflows and processes.
• Conduct ad-hoc threat hunts and participate in D&R on-call rotations.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed