Senior Software Engineer - Infrastructure Security

ABOUT THE ROLE We're seeking a Senior Software Engineer - Infrastructure Security to join our team at Klaviyo. As a key member of our Infrastructure Security team, you'll play a critical role in building and operating the systems that help Klaviyo engineers ship secure software with confidence. You'll be responsible for designing, building, and maintaining cloud-native security services used across Klaviyo, collaborating with senior engineers on system design and architecture, and identifying performance, reliability, and security issues in distributed systems. WHAT YOU'LL DO As a Senior Software Engineer on the Infrastructure Security team, you will: - Design, build, and maintain cloud-native security services used across Klaviyo - Own meaningful components and services end to end, from implementation through production operation - Improve the availability, scalability, latency, and efficiency of infrastructure security systems - Collaborate with senior engineers on system design and architecture, contributing ideas and technical solutions - Identify performance, reliability, and security issues in distributed systems and drive improvements - Work extensively with technologies such as Python, Golang, AWS, Kubernetes, Terraform, and modern data stores - Participate actively in design reviews, code reviews, and whiteboarding sessions - Contribute to operational excellence through monitoring, alerting, and incident response - Participate in an on-call rotation with a focus on learning, prevention, and reducing operational toil - Build tooling, automation, and documentation that improve developer experience and security posture - Partner with product-facing and platform engineers to ship impactful, secure solutions WHAT YOU'LL NEED You have 6+ years of solid experience building and operating cloud-native, distributed systems in production. You are comfortable writing production-quality code in a language such as Python or Go. You have hands-on experience with AWS (or a similar cloud provider) and understand managed services, networking, and IAM concepts. You have experience working with containers and orchestration platforms such as Kubernetes and writing infrastructure as code using languages such as Terraform. You are comfortable owning services and features independently, while knowing when to ask for feedback or support. WHY REMOTE At Klaviyo, we value the unique backgrounds, experiences, and perspectives each team member brings to our workplace. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. We empower creators to own their own destiny and offer a flexible, remote work environment that allows you to work from anywhere. BENEFITS Klaviyo offers a comprehensive benefits package, including health insurance, parental leave, education stipend, life insurance, equipment stipend, flexible schedule, and opportunities for professional growth and development.