About this role
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.
Team Overview
The mission of the Platform Engineering team is to provide the infrastructure primitives, platforms, tooling, and guidance that let every engineering team at Klaviyo build, ship, and operate with confidence. We own the paved path for how product teams manage their services, applications, and data — spanning core infrastructure, observability, databases, and queuing.
As a Lead Software Engineer on the Platform Engineering team, you will set technical direction for our core platform services, ensuring our platform primitives scale with Klaviyo’s growth while remaining simple, reliable, and cost-efficient for the teams that depend on them. Your work will be highly visible and will directly shape how thousands of Klaviyo engineers build and ship products every day.
How you’ll make an impact
As a Lead Software Engineer, you will provide technical leadership across the Platform Engineering org while remaining hands-on with the systems you build. You will:
• Build a deep understanding of engineering needs across the organization, guiding the design and development of the right platform primitives (infrastructure, databases, queuing, and more) and balancing the platform's vision with the practical needs of product teams
• Set the technical vision and long-term roadmap for core platform services, translating organizational priorities into a clear, multi-year plan
• Own the design, development, and evolution of foundational platform primitives that product teams rely on to ship quickly and safely
• Lead cross-team initiatives that improve the availability, scalability, latency, and cost-efficiency of Klaviyo’s core platforms, and drive adoption of the resulting paved paths
• Identify systemic gaps and architectural bottlenecks, and lead the design and delivery of solutions
• Leverage technologies such as Python, Go, AWS, and Kubernetes to advance the platform, partnering closely with security, and product engineering leaders
• Champion best practices across the organization, including technical design review, configuration as code, and defensive programming
• Drive cost-optimization efforts across the platform — right-sizing infrastructure, improving resource utilization, and building the tooling and guardrails that make cost-efficiency the default
• Mentor senior and mid-level engineers, raising the bar for technical quality and engineering craft across the Platform Engineering org
• Participate in a