Senior Security Engineer - AI-Driven Detection & Response

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

Benefits offered by this job

Annual bonus

Equity

Sign-on payments

Health and wellbeing benefits

Job summary

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response Team. You will own end-to-end detection and response work across enterprise, cloud, and product environments, shaping automation and AI-driven security in production, with a team spanning multiple regions and time zones.

You will develop detections-as-code, hunt threats, triage alerts, and lead investigations while mentoring teammates and contributing to on-call rotations in a fast-paced, engineering-first security

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).
• Familiarity with large-scale data pipelines and data engineering techniques.
• Proficient in programming languages to automate / build (e.g., Python, Go or similar).
• Proven experience with git/GitHub and CI/CD automations.
• Familiarity with tactics, techniques, and procedures used by threat actors.
• Experience being part of detection and response or incident response on-call.
• Engineering-first and AI-first approach for all work performed.
• Strong passion for continuous learning and staying updated on evolving technology.
• Strong oral and written communication skills.
• Team player with a strong, self-managing work ethic.

Responsibilities

• Develop, test, and deploy high-fidelity rule-based and anomaly-based 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.
• Improve and maintain detection and response pipelines and underlying systems.
• Work with our Threat Intelligence team to identify and respond to sophisticated threats.

Skills

Security engineering

Cloud security

Threat hunting

Incident response

Python

Go

Detections-as-code

SQL Splunk

CI/CD

On-call

Job description

Klaviyo is seeking a Senior Security Engineer to join the Detection & Response Team. You will own end-to-end detection and response work across enterprise, cloud, and product environments, shaping automation and AI-driven security in production, with a team spanning multiple regions and time zones.

You will develop detections-as-code, hunt threats, triage alerts, and lead investigations while mentoring teammates and contributing to on-call rotations in a fast-paced, engineering-first security