Senior Security Engineer — AI-Driven Detection & Response

Klaviyo Inc.; San Francisco, Northern (CA, KY); Hybrid; USD 142,000 - 212,000; Full time

Job summary

Klaviyo is seeking a Senior Security Engineer to join the Detection and Response (D&R) Team. This hands-on role focuses on building secure, scalable detection and response systems and participating in end-to-end detection development and incident response lifecycle.

You will develop AI-first security systems, onboard and optimize logging data, and engage in on-call rotations to improve Klaviyo’s security posture. Strong programming, incident response, and collaborative skills are essential.

Qualifications

• Automation-first and AI-first approach for all work performed.
• Experience with centralized logging, data lakes, and SIEM solutions
• 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
• 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

• Build systems that facilitate security observability for detection and response
• Develop AI-first security systems to automate detection and response operations
• Onboard, normalize and optimize security logging data for large-scale data analysis, detection engineering, deployment of ML models, and efficient querying during incidents.
• Develop high-fidelity rule-based and/or ML-based detections as code
• Respond to security alerts, cyber threats, and security incidents
• Drive end-to-end incident response investigations
• Automate and codify detection and response workflows and processes
• Conduct ad-hoc threat hunts and be an active member of D&R on-call rotations

Skills

5+ years experience

Automation-first

AI-first approach

Centralized logging

Data lakes

SIEM solutions

Python

Go

Git/GitHub

CI/CD automation

Threat actor TTPs

On-call incident response

Continuous learning

Communication skills

Team player

Tools

GitHub CI/CD

CI/CD tools

Job description

Klaviyo is seeking a Senior Security Engineer to join the Detection and Response (D&R) Team. This hands-on role focuses on building secure, scalable detection and response systems and participating in end-to-end detection development and incident response lifecycle.

You will develop AI-first security systems, onboard and optimize logging data, and engage in on-call rotations to improve Klaviyo’s security posture. Strong programming, incident response, and collaborative skills are essential.