Senior Software Engineer – Developer Infrastructure

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

Developer Infrastructure at Klaviyo is a force multiplier organization. It’s our job to make sure that engineers can ship quickly, confidently, and with minimal friction. The team builds foundational backend services as well as tooling and automation to allow product teams to test and release their software reliably and predictably. Engineers in Developer Infrastructure are team players who work collaboratively amongst themselves and with engineers from product teams to build the platform Klaviyo relies on to power its products.

As a Senior Software Engineer in Developer Infrastructure you will own multiple foundational Klaviyo services and make a big impact on the productivity of our product engineering teams.

How you will make a difference:

• 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
• 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.
• 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.
• Participate in periodic on call duties with a focus on solving issues when they are discovered, preventing recurrences and minimizing alert fatigue
• Work hand-in-hand with product-facing engineers to ship impactful code
• Perform quantitative analysis to understand and scale Klaviyo systems and manage the cross-functional effort to resolve scalability issues
• Produce and advocate for preventative, upstream solutions with internal stakeholders and external vendors and dependencies
• Confidently make informed, data-driven decisions in a fast paced environment with competing priorities
• Evangelize software development best practices across the engineering organization

Who You Are:

• BA or BS Degree in Computer Science, related field, or equivalent experience
• 5+ years of responsibility operating & scaling complex distributed systems
• Experience developing applications in Python, Ruby, Go, etc.
• Experience working on an engineering team building software
• Experience working on developer productivity tooling (local development, CI/CD, build systems)
• You’ve already experimented with AI in work or personal projects, and you’re excited to dive in and learn fast. You’re hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient.

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