Security Engineer, Threat Detection

Company: Klaviyo Inc.
Location: San Francisco
Posted on: June 1, 2025

Job Description:

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves 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. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? Visit careers.klaviyo.com to see how we empower creators to own their own destiny.Klaviyo is looking for a security engineer to add to our growing Detection & Response Team. This is a hands-on technical role that involves detection engineering, attack path analysis, security orchestration and automation, and development of security tools to take our security program to the next level. As a security engineer, you will have the opportunity to identify attack paths (for our cloud, corporate and product environments), build detections-as-code leveraging our detection development pipeline, help implement machine techniques for threat detection, and execute on core detection and response engineering efforts.How you will make a difference:

• Develop, test, and deploy high fidelity signature and anomaly (DS/ML) based detections
• Conduct TTP-based threat models or attack path analysis to drive detection use cases
• Detect threats leveraging solutions such as SIEM, data lake, and cloud platforms
• Automate and codify detection and response processes and playbooks
• Build threat detection systems, tools, integrations and automations
• Configure and optimize detection and response technologies (e.g., SIEM, EDR, IDS/IPS)
• Support with threat response efforts and conduct ad-hoc threat hunts
• Support with log data onboarding into data lake and/or SIEM
• Collaborate across teams (site, product, engineering, IT) to understand Klaviyo environments and drive threat detection use casesWe'd love to hear from you if you have:
  • 3+ years of security experience in the modern cloud environments
  • Hands-on experience with SIEM and centralized logging (e.g., Splunk, Snowflake)
  • Strong coding skills to build/automate (e.g., Python, Go)
  • Experience with detection-as-code and/or securely deploying code via a CI/CD pipeline
  • Strong understanding of tactics, techniques, and procedures used by threat actors
  • Experience with threat modeling or attack path analysis to drive detection use cases
  • Knowledge of system fundamentals, OS internals, and file systems for Linux and MacOS
  • Knowledge of network security fundamentals and application in a cloud-first environment
  • Automation-first approach for detection and response work performed
  • Experience creating detections for Okta, Salesforce, Google Workspace a plus
  • Experience securing cloud environments such as AWS, GCP, and/or Azure
  • Team player with a strong, self-managing work ethicThe pay range for this role is listed below. This role is eligible for benefits, including: medical, dental and vision coverage, health savings accounts, flexible spending accounts, 401(k), flexible paid time off and company-paid holidays and a culture of learning that includes a learning allowance and access to a professional coaching service for all employees.Base Pay Range For US Locations:$120,000 - $180,000 USDGet to Know KlaviyoWe'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 ecommerce 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.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.
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Keywords: Klaviyo Inc., Antioch , Security Engineer, Threat Detection, Engineering , San Francisco, California