The opportunity
Identity and Access Management (IAM) controls how people, services, integrations, and AI agents access Klaviyo.
What you'll do
Lead business-critical projects from design through launch and long-term operation.
Build secure, reliable services for authentication, authorization, delegation, auditing, and revocation.
Break ambiguous problems into clear work that several engineers can deliver together.
Own the customer impact, reliability, and technical quality of your work in production.
Improve the architecture of your area as scale, security, and product needs change.
Define and maintain SLOs for the systems that you own.
What they're looking for
- You have 7+ years of experience building and operating production software.
- You have hands-on experience developing production services in Go or Python.
- You have experience with authentication, authorization, identity, or related security systems.
- You have built networking systems, API gateways, APIs, or SDKs.
- You have led complex projects that spanned multiple engineers and several months.
- You take end-to-end ownership and stay with your work after launch.
- You communicate clearly, work well across teams, and make practical technical decisions.
- You mentor other engineers and raise the quality bar through feedback and example.
