Senior Security Engineer: AI-First Detection & Response

Xapply; Greater London; Hybrid; GBP 84,000 - 126,000; Full time

Job summary

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response team, shaping engineering-first security across enterprise, cloud, and product environments. The role emphasizes building detections-as-code, incident response leadership, and automation at scale with AI-enabled tooling.

The engineer will tackle large-scale security challenges, contribute to threat hunting, and collaborate with global teams in a fast-paced, security-focused culture at Klaviyo.

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 or digital forensics.
• Proficient in SQL, Splunk or similar data querying.
• Proficient in Python or Go for automation.
• Experience with Git/GitHub and CI/CD automations.

Responsibilities

• Develop, test, and deploy high-fidelity detections-as-code.
• Detect and respond to cyber threats using security data lake and SIEM.
• 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.
• Coach and mentor security engineers within the detection & response team.

Job description

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response team, shaping engineering-first security across enterprise, cloud, and product environments. The role emphasizes building detections-as-code, incident response leadership, and automation at scale with AI-enabled tooling.

The engineer will tackle large-scale security challenges, contribute to threat hunting, and collaborate with global teams in a fast-paced, security-focused culture at Klaviyo.