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Klaviyo

Software Engineer II - Identity & Access Management

Boston, MAFrom $174kmidAdded 2 months ago

About this role

Join Klaviyo's Identity & Access Management team to design and build enterprise-grade authentication and authorization services that power the platform. You'll own features end-to-end—from login and MFA to SSO and API security—while modernizing the identity stack and enabling product teams to ship faster and more securely.

What you'll do

  • Own authentication and authorization features end-to-end including design, implementation, rollout, and observability
  • Extract auth capabilities from the legacy monolith into dedicated microservices and manage token verification and API key services
  • Build and maintain shared SDKs and contracts for secure-by-default identity adoption across internal teams
  • Collaborate with Organizations and Platform Integrity teams on org-scoped identity, multi-account SSO, and account protection
  • Improve reliability and performance through instrumentation, metrics, alerting, and on-call participation
  • Define platform-wide standards for authentication, authorization, audit logging, and integration patterns

What they're looking for

  • Backend or full-stack production systems experience (2-5+ years)
  • Data modeling, API design, concurrency, and failure mode reasoning
  • Debugging and observability (logs, metrics, traces)
  • Authentication and authorization expertise (OAuth, MFA, SSO, SCIM, RBAC)
  • Distributed systems and microservices architecture
  • Security-focused engineering and secure-by-default patterns
  • Platform/infrastructure thinking and shared service design
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Klaviyo

Klaviyo builds a platform for personalized mobile app experiences and customer engagement, offering SDKs, identity and access management services, and onboarding solutions. The company is hiring software engineers across mobile development, identity systems, product activation, and internal platform teams.

Website
klaviyo.com
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Likely interview questions

  • Can you walk us through a production authentication or authorization system you've built or significantly contributed to? What were the key design decisions and challenges?
  • Describe your experience with OAuth, SSO, or similar identity protocols. How have you implemented or integrated these in a production environment?
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