Senior Detection & Response Engineer — AI-First Security

Klaviyo; San Francisco (CA); On-site; USD 142,000 - 212,000; Full time

Job summary

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response Team. This role spans the full security lifecycle, from building detections and triaging alerts to leading investigations and developing AI-enabled security automation.

You will impact enterprise, cloud, and product environments, collaborating across regions and time zones to strengthen our security posture. Ideal candidates bring 5+ years in cloud security, threat triage, forensics, and a passion for automation.

Qualifications

• Hands-on security in modern cloud environments.
• Experience triaging cyber threats and incident response.
• Experience with large-scale log analysis and forensics.
• Knowledge of centralized security data lakes and SIEMs.
• Proficient in automation and detections-as-code.

Responsibilities

• Develop, test, and deploy detections-as-code with engineering practices.
• Detect and respond to threats using SIEM and cloud data.
• Lead end-to-end incident response investigations.
• Perform digital forensics and evidence analysis.
• Automate detection and response workflows and tooling.
• Build automation to accelerate the D&R lifecycle.
• Improve and maintain detection pipelines and data integrity.
• Collaborate with Threat Intelligence to identify advanced threats.
• Develop AI-first security systems for automation in production.
• Conduct threat hunts across corporate, cloud, and product environments.
• Support data engineering for data lake and SIEM.
• Participate in on-call rotations and post-incident reviews.
• Mentor junior security engineers in D&R.

Skills

Cloud security

Threat hunting

Incident response

Detections-as-code

Python

Go

SQL

Splunk

Git/GitHub

CI/CD automation

Tools

SIEM (various)

GitHub Actions

Cloud platforms (AWS/Azure/GCP)

Job description

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response Team. This role spans the full security lifecycle, from building detections and triaging alerts to leading investigations and developing AI-enabled security automation.

You will impact enterprise, cloud, and product environments, collaborating across regions and time zones to strengthen our security posture. Ideal candidates bring 5+ years in cloud security, threat triage, forensics, and a passion for automation.