Klaviyo · 7 hours ago
Senior / Lead Security Engineer
Boston, MA
Full-time
Hybrid
Senior Level, Lead/Staff
$188K/yr - $282K/yr
5+ years expKlaviyo is seeking a Senior / Lead Security Engineer to be a vital part of their Infrastructure Security Team. The role focuses on strengthening security across Klaviyo's technology environment, developing security architectures, and mentoring colleagues while collaborating with cross-functional teams to address emerging threats.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Hiring Manager
Doug Hamilton, MBA
Responsibilities
Secure Klaviyo's infrastructure by designing, implementing, and maintaining scalable security controls across cloud, on-prem, and hybrid environments
Evaluate and improve security configurations and policies across a range of technologies, using your domain expertise to reduce risk and enable secure-by-default architectures
Collaborate with engineering and IT teams to embed security practices and develop repeatable security patterns across the development and deployment lifecycle
Lead threat modeling, risk assessments, and architecture reviews in areas aligned with your specialty
Develop automated solutions and infrastructure-as-code to drive consistent and reproducible security outcomes
Stay ahead of the latest threats and advocate for innovative security solutions aligned with business needs
Help define security standards and best practices at Klaviyo, championing their adoption across teams
Qualification
Required
5+ years of experience in infrastructure or security engineering roles, with deep knowledge in one or more security focus areas (e.g., cloud security, IAM, endpoint security, data protection, detection engineering, compliance)
Comfortable navigating ambiguity and defining priorities in a broad-scoped role
Experienced working in modern cloud environments such as AWS, GCP, or Azure
Familiar with infrastructure-as-code tools such as Terraform, CloudFormation, or Pulumi
Proficient in secure systems design, threat modeling, and vulnerability management
AI Agentic development and prompt engineering, MCP (AWS Bedrock, OpenAI, Anthropic)
Able to clearly articulate complex security topics to technical and non-technical stakeholders
Passionate about security, eager to learn from others and share your expertise
Preferred
certifications (e.g., CISSP, CKS, GCP/AWS Security certs) or equivalent practical experience
Company
Klaviyo
Klaviyo is an automation and email platform designed to help grow businesses.
1001-5000 employees
H1B Sponsorship
Klaviyo has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (47)
2024 (29)
2023 (24)
2022 (27)
2021 (21)
2020 (8)
Funding
Current Stage
Public CompanyTotal Funding
$1.35BKey Investors
ShopifySands Capital VenturesAccel
2025-08-13Post Ipo Secondary· $195.06M
2025-05-14Post Ipo Secondary· $372.95M
2023-09-20IPO
Leadership Team
Andrew Bialecki
CEO
Ed Hallen
Co-Founder, Chief Strategy Officer, Board Member
Recent News
Investing.com
2026-01-03
2025-12-17
Company data provided by crunchbase