Senior Detection & Response Engineer

Klaviyo; Greater London; On-site; GBP 84,000 - 126,000; Full time

Job summary

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response Team. You will build detections, triage alerts, lead investigations, and drive incident response across enterprise, cloud, and product environments.

This role emphasizes automation and AI in production at scale. Ideal candidates have 5+ years in security within modern cloud setups, strong SIEM and data lake experience, and proficiency in Python or Go.

Qualifications

• 5+ years of hands-on security experience in modern cloud environments.
• Experience in triaging and responding to cyber threats.
• Hands-on experience in writing detections-as-code.
• Experience with centralized security data lakes and SIEM solutions.

Responsibilities

• Develop and deploy high-fidelity detections as code.
• Detect and respond to cyber threats using security data lake, SIEM, and cloud platforms.
• Respond to alerts, cyber threats, and drive end-to-end incident response investigations.
• Perform digital forensic investigations to include collection and analysis of evidence.
• Automate and codify detection and response workflows and processes.
• Build security tooling to drive automation across D&R lifecycle.

Skills

Security engineering

Cloud security

SIEM

Detections as code

Python

Go

Git/GitHub

CI/CD

Threat hunting

Incident response

Tools

Splunk

SQL

Job description

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response Team. You will build detections, triage alerts, lead investigations, and drive incident response across enterprise, cloud, and product environments.

This role emphasizes automation and AI in production at scale. Ideal candidates have 5+ years in security within modern cloud setups, strong SIEM and data lake experience, and proficiency in Python or Go.