Greenhouse ·
full-timeSenior Security Engineer - Detection And Response
Klaviyo · Boston, MA
Klaviyo is a marketing automation platform that provides data-driven tools for businesses to manage their email and SMS marketing. As a Senior Security Engineer on the Detection and Response team, you will focus on building and maintaining scalable systems to enhance security observability. Your daily responsibilities will involve developing high-fidelity detection rules, utilizing machine learning models to automate security operations, and managing the end-to-end incident response lifecycle. You will be responsible for normalizing security logging data, conducting threat hunts, and participating in on-call rotations to address active cyber threats. This role requires a strong background in software or data engineering, as you will be expected to write code in languages like Python or Go to automate workflows and maintain CI/CD pipelines. This position is well-suited for a security professional with significant experience in SIEM solutions, large-scale data pipelines, and a proactive approach to threat detection. Candidates should be comfortable working in an automation-first environment and possess the technical depth to solve complex security challenges while collaborating across teams.
Education
- Level: Bachelor's degree
Key Skills
Experience required
5-5 years experienceAbout the Role Senior Security Engineer - Detection And Response at Klaviyo. Hands‑on technical role building and maintaining secure, reliable, and scalable detection and response systems. Responsibilities Build security observability systems 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 analysis, detection engineering, ML model deployment, and querying during incidents. Create high‑fidelity rule‑based and/or ML‑based detections as code. Respond to security alerts, cyber threats, and incidents. Drive end‑to‑end incident response investigations. Automate and codify detection and response workflows. Conduct ad‑hoc threat hunts and participate in on‑call rotations. Requirements 5+ years of experience in software, security, and/or data engineering. Automation‑first and AI‑first mindset. Experience with centralized logging, data lakes, and SIEM solutions. Familiarity with large‑scale data pipelines and data engineering techniques. Proficient in programming languages such as Python or Go. Experience with Git/GitHub and CI/CD automation. Knowledge of threat actor tactics, techniques, and procedures. Experience in detection/response or incident response on‑call. Strong communication skills and self‑managing work ethic.
Skills for this role
Required skills
Also mentioned in the listing
| Role | Senior Security Engineer - Detection And Response |
|---|---|
| Company | Klaviyo |
| Location | Boston, MA |
| Type | full-time |
| Compensation | Not disclosed |
| Posted | 2026-10-20 |
| Deadline | Rolling |
Typical process for this type of role
A general guide — the exact steps for this specific listing may vary; check the original posting for details.
- 1ApplicationSubmit your resume through the apply link.
- 2ScreeningRecruiter reviews your background against the role.
- 3AssessmentA technical test, assignment, or coding round, depending on the role.
- 4Interview(s)One or more rounds with the hiring team.
- 5OfferOffer letter with compensation and start date.
Before you apply
0/4About Klaviyo
Klaviyo, Inc. is an AI-first B2C CRM platform founded in 2012 and headquartered in Boston. The company provides a unified solution that integrates marketing automation, customer service, analytics, and a data platform to help businesses manage customer relationships. By centralizing behavioral, transactional, and engagement data, Klaviyo enables brands to deliver personalized, omnichannel campaigns across email, SMS, WhatsApp, and mobile push notifications. The platform utilizes AI agents to automate marketing tasks, resolve customer service inquiries, and optimize campaign performance. Klaviyo currently serves over 205,000 brands across more than 100 countries, processing billions of events and managing billions of customer profiles daily to support business growth.
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