Senior Security Engineer - Detection and Response Boston, MA

Klaviyo is looking for a Senior Security Engineer to add to our growing Detection and Response (D&R) Team. This is a hands‑on technical role that involves building and maintaining secure, reliable, and scalable detection and response systems to enhance our security observability capabilities. This role will also be responsible for participating in the full end‑to‑end detection development and response lifecycle, and supporting threat response operations. As a Senior Security Engineer, you will have the opportunity to leverage your security and engineering skills to provide thought leadership, solve complex security challenges, and ultimately improve Klaviyo's overall security posture.How you will make a differenceBuild systems that facilitate security observability for detection and responseDevelop AI‑first security systems to automate detection and response operationsOnboard, normalise and optimise security logging data for large‑scale data analysis, detection engineering, deployment of ML models, and efficient querying during incidentsDevelop high‑fidelity rule‑based and/or ML‑based detections as codeRespond to security alerts, cyber threats, and security incidentsDrive end‑to‑end incident response investigationsAutomate and codify detection and response workflows and processesConduct ad‑hoc threat hunts and be an active member of D&R on‑call rotationsWe'd love to hear from you if you have5+ years of experience in software, security, and/or data engineeringAutomation‑first and AI‑first approach for all work performedExperience with centralised logging, data lakes, and SIEM solutionsFamiliarity with large‑scale data pipelines and data engineering techniquesProficient in programming languages to automate / build (e.g., Python, Go or similar)Proven experience with git/GitHub and CI/CD automationsFamiliarity with tactics, techniques, and procedures used by threat actorsExperience being part of detection and response or incident response on‑callStrong passion for continuous learning and staying updated on evolving technologyStrong oral and written communication skillsTeam player with a strong, self‑managing work ethicWe use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.Please see the independent bias audit report covering our use of Covey here#J-18808-Ljbffr

Klaviyo is looking for a Senior Security Engineer to add to our growing Detection and Response (D&R) Team. This is a hands‑on technical role that involves building and maintaining secure, reliable, and scalable detection and response systems to enhance our security observability capabilities. This role will also be responsible for participating in the full end‑to‑end detection development and response lifecycle, and supporting threat response operations. As a Senior Security Engineer, you will have the opportunity to leverage your security and engineering skills to provide thought leadership, solve complex security challenges, and ultimately improve Klaviyo's overall security posture.How you will make a differenceBuild systems that facilitate security observability for detection and responseDevelop AI‑first security systems to automate detection and response operationsOnboard, normalise and optimise security logging data for large‑scale data analysis, detection engineering, deployment of ML models, and efficient querying during incidentsDevelop high‑fidelity rule‑based and/or ML‑based detections as codeRespond to security alerts, cyber threats, and security incidentsDrive end‑to‑end incident response investigationsAutomate and codify detection and response workflows and processesConduct ad‑hoc threat hunts and be an active member of D&R on‑call rotationsWe'd love to hear from you if you have5+ years of experience in software, security, and/or data engineeringAutomation‑first and AI‑first approach for all work performedExperience with centralised logging, data lakes, and SIEM solutionsFamiliarity with large‑scale data pipelines and data engineering techniquesProficient in programming languages to automate / build (e.g., Python, Go or similar)Proven experience with git/GitHub and CI/CD automationsFamiliarity with tactics, techniques, and procedures used by threat actorsExperience being part of detection and response or incident response on‑callStrong passion for continuous learning and staying updated on evolving technologyStrong oral and written communication skillsTeam player with a strong, self‑managing work ethicWe use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.Please see the independent bias audit report covering our use of Covey here#J-18808-Ljbffr

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