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Senior Software Engineer - Developer Infrastructure

Klaviyo

$152,000 - $228,000
Nov 19, 2025
Boston, MA, US
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Klaviyo is looking to solve the problem of enabling engineers to ship quickly, confidently, and with minimal friction by building foundational backend services and tooling to improve developer productivity and system scalability.

Requirements

  • Experience developing applications in Python, Ruby, Go, etc.
  • 5+ years of responsibility operating & scaling complex distributed systems
  • Experience working on an engineering team building software
  • Experience working on developer productivity tooling (local development, CI/CD, build systems)

Responsibilities

  • Ship foundational services to enable Klaviyo engineering to move faster with confidence
  • Design and develop systems and processes that enable highly available & scalable systems
  • Design, build and deliver software to dramatically improve the availability, scalability, latency, and efficiency of Klaviyo’s internal developer productivity tooling
  • Achieve break-throughs in systems throughput by identifying and eliminating bottlenecks
  • Leverage technology such as Python, Go, Bash, Django, AWS, Kubernetes, Terraform, MySQL, Apache Pulsar, Redis, and Clickhouse to advance Klaviyo’s platform
  • Mentor and pair with other Klaviyo engineers to build better software by focusing on performance, self-healing system, configuration as code; defensive programming, application security, etc.
  • Perform quantitative analysis to understand and scale Klaviyo systems and manage the cross-functional effort to resolve scalability issues

Other

  • BA or BS Degree in Computer Science, related field, or equivalent experience
  • Participate in periodic on call duties with a focus on solving issues when they are discovered, preventing recurrences and minimizing alert fatigue
  • Champion best practices by actively collaborating with other teams in a culture that values technical design review
  • Contribute to the company as a subject matter expert in multiple areas, constantly pushing yourself to be a better engineer and to level up all of your peers within your team and within Klaviyo
  • Evangelize software development best practices across the engineering organization