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 klaviyo.com/careers to see how we empower creators to own their own destiny.
As a Lead Security Engineer on the Enterprise Security team you’ll play a central role in securing the corporate systems and platforms that Klaviyo runs on — spanning critical SaaS applications identity and access endpoints Zero Trust network architecture and perimeter security. You’ll partner across Engineering IT and the broader Security organization to mature existing programs introduce new capabilities and ensure our corporate security posture keeps pace with a fast-moving AI-first company.
This is a hands-on technical leadership role. You’ll be expected to deliver complex cross-functional projects end to end establish the design patterns and standards your team works from and mentor the engineers around you. You bring deep expertise in at least one enterprise security domain and the range to work credibly across several others.
At Klaviyo AI fluency isn’t optional — it’s foundational. You’ll lead with AI at every stage of your work from designing solutions to iterating on implementations and you’ll take full ownership of the quality and security of what you ship.
How You Will Make a Difference- Partner across several teams to drive the security architecture and lifecycle of Klaviyo’s critical SaaS applications from procurement to offboarding
- Ensure the design and operations of identity and access management (IAM) across corporate SaaS platforms including Just-in-Time Access (JITA) privilege management and SSO/SCIM integrations; ensuring identity implementation meets or exceeds security standards
- Mature and expand Klaviyo’s Zero Trust network architecture — establishing web gateways defining secure access policies and building the foundation for a modern corporate network security posture
- Champion an AI-first approach to security engineering: designing prototyping and iterating with AI tools and owning the responsible review and deployment of AI-generated artifacts
- Manage and mature Cloudflare WAF policies and other perimeter security controls ensuring coverage tuning and continuous improvement
- Expand and mature Klaviyo’s endpoint security strategy and tooling partnering with IT Detection Response and the broader security teams to achieve full endpoint visibility proactive threat coverage and rapid response capability across the fleet
- Deliver complex multi-team projects by decomposing technical problems into actionable workstreams setting the pace through all phases from requirements through production
Who You Are
- Have 7+ years of experience in security or infrastructure engineering roles with demonstrated ownership of enterprise security domains such as SaaS security IAM Zero Trust endpoint security or cloud-delivered security services
- Approach every project AI-first: you design with AI refine with AI and take full responsibility for validating and owning what you deploy — you are not a passive consumer of AI output
- Hands-on by default — you are equally comfortable writing policy-as-code reviewing architecture and debugging a production issue
- Proficient with Terraform for building and maintaining infrastructure-as-code across enterprise security systems
- Experienced operating in AWS environments with strong familiarity with cloud security services IAM policies and secure architecture patterns
- Experience with enterprise IdP solutions such as Okta AWS Cognito
- Experienced with enterprise security tooling such as Cloudflare (WAF gateway) Wiz (CNAPP/cloud security) and CrowdStrike (EDR/endpoint)
- Knowledgeable in secrets management JITA and modern identity patterns including SSO SCIM and privileged access workflows including SAML 2.0 SCIM OAuth and OIDC — note this is not a dedicated IAM role; fluency in these areas supports broader enterprise security ownership not identity program management
- Experienced mentoring engineers and working through influence: you raise the bar for the people around you and hold team-wide technical standards
- Nice to have: experience with GCP or Azure environments Spacelift for IaC orchestration AI agent development or securing AI coding platforms (e.g. Lovable Vercel Cursor)
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 US 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.
In addition to base salary our total compensation package may include participation in the company’s annual cash bonus plan variable compensation (OTE) for sales and customer success roles equity sign-on payments and a comprehensive range of health welfare and wellbeing benefits based on eligibility.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
This role may require up to 10% travel for purposes such as new hire onboarding client or partner work if applicable team meetings and industry events. Travel is coordinated in advance.
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 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.
AI fluency at Klaviyo includes responsible use of AI (including privacy security bias awareness and human-in-the-loop). We provide accommodations as needed.
By participating in Klaviyo’s interview process you acknowledge that you have read understood and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data see our Job Applicant Privacy Notice.
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.
Skills Required
- 7+ years of experience in security or infrastructure engineering roles
- Deep expertise in enterprise security domains like SaaS security and IAM
- Proficient with Terraform for infrastructure-as-code
- Experienced operating in AWS environments
- Experience with enterprise IdP solutions such as Okta
- Knowledgeable in secrets management and identity patterns
- Mentoring engineers and holding technical standards
What the Team is Saying
What We Do
Klaviyo (NYSE: KVYO) is the B2C CRM. Powered by its built-in data platform and AI Klaviyo combines marketing automation analytics and customer service into one unified solution making it easy for businesses to know their customers and grow faster. Klaviyo (CLAY-vee-oh) helps over 183000 brands like Mattel Glossier Daily Harvest and Liquid Death deliver 1:1 experiences at scale improve efficiency and drive revenue.
Why Work With Us
We refer to our employees as ‘Klaviyos’ and we make up a diverse community united around shared values: We’re curious collaborative driven innovative fun and fully ourselves at work. No matter which team you join your work won’t just impact Klaviyo. It’ll help empower our customers and enable creators across the globe to own their destinies.
Gallery
Klaviyo Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
Similar Jobs
Klaviyo
Senior Customer Education Specialist (Training)
Klaviyo
Senior Solutions Architect
Klaviyo
Commercial Partner Sales Specialist
Klaviyo
Account Manager
Explore More
Date Posted
05/20/2026
Views
0
Similar Jobs
Senior Implementation Consultant - Enterprise AI Delivery -
Views in the last 30 days - 0
View Details