Senior Software Engineer - Channel Rendering

About the Team:

The Channel Rendering and Engagement (CRE) team is responsible for the high-performance systems that power the rendering, delivery, and engagement tracking of communications across all channels at Klaviyo—including email, SMS, push, and more. We build and maintain the core infrastructure that ensures every message is generated, delivered, and tracked reliably, at scale, and in compliance with industry standards. This role will contribute to architecture and implementation of complex distributed backend services, ensuring high throughput and low latency. Success in this role relies on both technical excellence and the ability to work across teams and roles.

How You Will Make a Difference:

• Own and drive key components of the email pipeline architecture


• Design and implement scalable, high-throughput services in Go


• Develop systems that manage message queues and email delivery


• Help ensure our systems scale with customer growth, especially as we bring on larger enterprise accounts


• Collaborate cross-functionally to ensure the highest standards of performance, reliability, and deliverability

Who You Are:

• Senior-level backend engineer with strong systems design skills


• Proficient in Go (required). experience with Python is a plusExperienced working with high-throughput distributed systems


• Familiar with message queues (e.g., Pulsar, Kafka, RabbitMQ, SQS)


• Comfortable working independently on projects from design through production


• Able to thrive in a mostly remote team and deliver in a high-autonomy environment

Technologies We Use:

• Languages: Go , Python


• Infrastructure: AWS , DynamoDB, Kubernetes, Terraform

Frameworks: Gin (Go), Django (Python)

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