Senior Security Engineer - Detection and Response

Senior Security Engineer - Detection and Response IT & Security Denver, CO At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyos brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. 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 difference 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 investigationsAutomate and codify detection and response workflows and processes Conduct ad‑hoc threat hunts and be an active member of D&R on‑call rotations We’d love to hear from you if you have 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 Massachusetts Applicants It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability. Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our U.S. locations. The base salary offered for this position is determined by several factors, including the applicant’s job‑related skills, relevant experience, education or training, and work location. Base Pay Range For U.S. Locations: $141,600 — $212,400 USD Get to Know Klaviyo We’re Klaviyo (pronounced clay‑vee‑oh). We empower creators to own their destiny by making first‑party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in e‑commerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us. Equal Opportunity Statement Klaviyo is committed to a policy of equal opportunity and non‑discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law. #J-18808-Ljbffr Klaviyo Inc.