Senior Security Engineer — AI-Driven Detection & IR

Klaviyo; Boston (MA); On-site; USD 142,000 - 212,000; Full time

Job summary

Klaviyo seeks a Senior Security Engineer to join the Detection and Response (D&R) Team in Boston. This hands-on role builds and maintains secure, scalable detection and response systems, and participates in end-to-end detection development and incident response lifecycle.

You will apply AI-first security approaches, optimize security logging, and develop rule-based or ML-based detections. Collaboration across teams is essential to strengthen Klaviyo’s security posture and readiness for threats.

Qualifications

• 5+ years of experience in software, security, and/or data engineering
• 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

Automation-first

AI-first

Centralized logging

Data lakes

SIEM

Data pipelines

Python

Go

Git/GitHub

CI/CD

Threat actor TTPs

On-call

Communication

Teamwork

Tools

Python

Go

Job description

Klaviyo seeks a Senior Security Engineer to join the Detection and Response (D&R) Team in Boston. This hands-on role builds and maintains secure, scalable detection and response systems, and participates in end-to-end detection development and incident response lifecycle.

You will apply AI-first security approaches, optimize security logging, and develop rule-based or ML-based detections. Collaboration across teams is essential to strengthen Klaviyo’s security posture and readiness for threats.