Software Engineer II, Platform Engineering

Requirements

• BA or BS Degree in Computer Science, related field, or equivalent experience
• 3+ years of responsibility operating and scaling complex distributed systems
• Experience working in a cloud-native environment
• Proven experience developing applications in Python and/or Go
• Fundamental understanding of Linux and all layers of the networking stack
• Experience in a subset of platform-related areas such as Kubernetes, infrastructure as code, API gateways & traffic management, observability, or asynchronous processing tooling
• Exposure to or interest in measuring and optimizing infrastructure cost and efficiency
• Familiarity with high-volume data processing and storage systems, and with OLTP and OLAP databases
• Exposure to the data ecosystem — e.g., ClickHouse, DynamoDB MySQL, Kafka, Spark, Flink, Iceberg, or Airflow — a plus

What You'll Be Doing

• Ship foundational services to enable Klaviyo engineering to move faster with confidence
• Develop an understanding of engineering needs across the organization, contributing the design and development of appropriate platform primitives (Infra, Databases, Queuing, etc), that align with the platform's vision
• Design, develop, and deliver software to dramatically improve the availability, scalability, latency, and cost efficiency of Klaviyo's core platforms, helping teams to better serve customers, operate within budget, and meet their SLOs
• Design and develop systems and processes that enable highly available and scalable applications
• Leverage technology such as Python, Go, AWS, and Kubernetes to advance Klaviyo's platform
• Pair with and learn from other Klaviyo engineers to build better software by focusing on performance, self-healing systems, configuration as code, and defensive programming
• Help identify and implement cost-optimization opportunities across the platform — right-sizing infrastructure, improving resource utilization, and building tooling that makes cost efficiency the default for product teams

Nice to Haves

• Exposure to the data ecosystem — e.g., ClickHouse, DynamoDB MySQL, Kafka, Spark, Flink, Iceberg, or Airflow — a plus

Perks and Benefits

• Salary range: €76,000 — €114,000 EUR
• This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance