Klaviyo
Senior Software Engineer - Identity and Access Management
$148K–$222K
Boston, MA +1 · Senior · Full-time · Posted Sep 15, 2026
- Location
- Boston, MA
Boston, Massachusetts, United States - Experience
- 7+ years building and operating production software.
About the job
Leads hands-on development and operation of secure identity and access services for users, machines, integrations, and AI agents across the Klaviyo platform.
What you'll do
- Lead business-critical IAM projects from design through launch and ongoing operation, and own their reliability and customer impact.
- Build and improve services for authentication, authorization, delegation, auditing, and revocation; define and maintain SLOs.
- Coordinate across teams, create reusable IAM patterns, mentor engineers, and responsibly apply and share new engineering and AI tools.
What they ask for
- 7+ years of experience building and operating production software.
- Hands-on experience developing production services in Go or Python.
- Experience with authentication, authorization, identity, or related security systems.
- Experience building networking systems, API gateways, APIs, or SDKs, and leading complex projects spanning multiple engineers and several months.
Nice to have
- Experience with auth or policy systems, or secure platforms used by other engineering teams.
- Experience with AWS, Terraform, Kubernetes, React, or Django; or enterprise security, auditability, data residency, or compliance needs.
Pay
$148,000 — $222,000 USD base salary
Tools
Go, Python, AWS, Terraform, Kubernetes, React, Django
AI focus
The IAM team builds authentication and authorization for AI agents accessing the platform. The role also applies engineering and AI tools responsibly, with attention to privacy, security, bias awareness, and human-in-the-loop.
Model-written summary · the original posting is authoritative