Senior Security Engineer, Detection & Response (AI-First)

Klaviyo; Denver (CO); On-site; USD 142,000 - 212,000; Full time

Job summary

Klaviyo is hiring a Senior Security Engineer to join the Detection & Response Team. This engineering role covers the full detection and response lifecycle, building detections, triaging alerts, leading investigations, and developing tooling to scale security across enterprise, cloud, and product environments.

The role emphasizes automation, AI-enhanced security, and collaboration with Threat Intelligence, data engineering, and other regions.

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.
• Solid data querying skills (e.g. SQL, Splunk).
• Proficient in programming languages to automate/build (Python, Go).
• Git/GitHub and CI/CD automations.
• Familiarity with threat actor tactics, techniques, and procedures.
• Experience on-call for detection & response or incident response.
• Engineering-first and AI-first approach for all work performed.
• Strong learning mindset and communication skills.
• Team player with a self-managing work ethic.

Responsibilities

• Develop, test, and deploy high-fidelity detections-as-code.
• Detect and respond to cyber threats using security data lake, SIEM, and cloud platforms.
• Respond to alerts and drive end-to-end incident response investigations.
• Perform digital forensic investigations and evidence analysis.
• Automate and codify detection and response workflows and processes.
• Build security tooling to drive automation across D&R lifecycle.
• Improve and maintain detection and response pipelines and underlying systems.
• Collaborate with Threat Intelligence to identify sophisticated threats.
• Develop AI-first security systems to automate detection and response operations.
• Conduct threat hunts across corporate, cloud and product environments.
• Support data engineering workflows for core security data lake and SIEM platforms.
• Be an on-call active member of D&R rotations.
• Coach and mentor security engineers in the team.

Skills

Cloud security

Threat detection

Incident response

Detections-as-code

SQL

Splunk

Python

Go

Git/GitHub

CI/CD

On-call experience

AI-first approach

Communication

Tools

SIEM

Data lake

Job description

Klaviyo is hiring a Senior Security Engineer to join the Detection & Response Team. This engineering role covers the full detection and response lifecycle, building detections, triaging alerts, leading investigations, and developing tooling to scale security across enterprise, cloud, and product environments.

The role emphasizes automation, AI-enhanced security, and collaboration with Threat Intelligence, data engineering, and other regions.