Senior Security Engineer: Detection & Response, AI-Driven

Klaviyo Inc.; Boston, Northern (MA, KY); Hybrid; USD 142,000 - 212,000; Full time

Benefits offered by this job

Annual bonus

Equity

Sign-on payments

Health benefits

Job summary

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response team. This role spans detection, triage, investigations, incident response, threat hunting, and building tooling for automation across enterprise, cloud, and product environments.

The engineer will implement AI-first security workflows and collaborate across regions. The position emphasizes engineering practices, incident response excellence, on-call rotations, and mentoring junior teammates as part of a broader

Qualifications

• 5+ years of hands-on security experience in modern cloud environments.
• Experience in triaging and responding to cyber threats.
• Experience in large-scale log analysis, incident response and/or digital forensics.
• Experience with centralized security data lakes and SIEM solutions.
• Hands-on experience in writing detections-as-code.

Responsibilities

• Develop, test, and deploy high-fidelity detections-as-code.
• Detect and respond to threats using data lake, SIEM, and cloud platforms.
• Lead incident response investigations and digital forensics.
• Automate detection and response workflows and tooling.
• Mentor security engineers within the team.
• Collaborate with Threat Intelligence on sophisticated threats.

Skills

Python/Go

Detections-as-code

SIEM

Cloud security

Threat hunting

Incident response

Git/GitHub

CI/CD automation

On-call

Communication

Tools

Splunk

GitHub

CI/CD pipelines

Job description

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response team. This role spans detection, triage, investigations, incident response, threat hunting, and building tooling for automation across enterprise, cloud, and product environments.

The engineer will implement AI-first security workflows and collaborate across regions. The position emphasizes engineering practices, incident response excellence, on-call rotations, and mentoring junior teammates as part of a broader