Senior Security Engineer: AI-Driven Detection & Response

Klaviyo; Denver, Northern (CO, KY); Hybrid; USD 142,000 - 212,000; Full time

Job summary

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

The position requires strong coding skills (Python/Go), experience with logging, SIEMs and data pipelines, and a passion for automating security operations.

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

Security engineering

Automation-first

AI-first

Logging & SIEM

Data pipelines

Python/Go

Git/GitHub

CI/CD automations

Threat intel / TTPs

On-call experience

Strong communicator

Job description

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

The position requires strong coding skills (Python/Go), experience with logging, SIEMs and data pipelines, and a passion for automating security operations.