Top Engineering Jobs

Design, build, and operate core platform services to improve availability, scalability, latency, and cost efficiency. Develop platform primitives (infra, databases, queuing), enable developer experience, and implement tooling for observability, self-healing, configuration-as-code, and cost optimization.

Design, build, and own foundational platform services and developer experience to improve availability, scalability, latency, and cost efficiency. Enable product teams via platform primitives (infra, databases, queuing), mentor engineers, drive cost-optimization, and deliver scalable, observable, self-healing systems using cloud-native tooling.

The Principal Engineer will lead enterprise scalability efforts, driving architectural changes, optimizing systems, and integrating AI for improved operational performance across multi-tenant SaaS platforms.

Lead technical design and delivery of Klaviyo's messaging pipeline, building scalable backend services (Python/Go), driving architecture, mentoring engineers, collaborating across product, compliance, and platform, and ensuring high-throughput, reliable message delivery at scale.

Design, build, and own highly scalable, highly available messaging infrastructure that processes hundreds of millions to billions of messages daily. Collaborate across teams on architecture, performance, monitoring, and reliability; mentor engineers; improve development and experimentation processes; participate in hiring and technical design.

Design, build, and own features and services for Klaviyo's large-scale messaging platform. Drive performance, scalability, monitoring, and reliability for a pipeline that delivers hundreds of millions to billions of messages. Collaborate across teams, mentor engineers, and participate in hiring and technical process improvements.

As a Software Engineer II on the Data Automation team, you will design and maintain the analytics infrastructure, collaborating with teams to ensure high system performance and reliability.

Lead the production infrastructure organization to define platform primitives (compute, storage, networking, observability), drive reliability (SLOs/SLIs, incident management, capacity planning), create golden paths and cost-effective frameworks, mentor and scale teams, collaborate cross-functionally on platform investments, and apply AI to improve infrastructure operations and developer productivity.

The Senior Solutions Architect will lead strategic engagements with clients, architect technical solutions, manage enterprise project deliveries, and act as a trusted advisor in martech implementations.

Build and maintain Klaviyo's Android SDK and adjacent mobile products (in-app messaging, universal linking, geofencing). Ship production-tested Android features, debug across devices and OS versions, contribute to other SDKs and backend services, write tests and docs, collaborate with product and engineering teams, and support customer integration issues.