Sr. Lead Software Engineer
Klaviyo · Boston
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- Company
- Klaviyo
- Location
- Boston
- Salary
- $216,000 — $324,000
- Posted
- October 16, 2026
About this job
Job Title: Sr. Lead Software Engineer Location: Boston, MA This role is based in our Boston hub. We operate a hub‑first model, with regular in‑office collaboration expected. About the Role At Klaviyo, we believe the future of software isn’t just better productivity tools for humans—it’s intelligent systems that can run, optimize, and adapt themselves based on real-time outcome and reward signals. Having already built the infrastructure and applications that connect businesses with over 200,000 customers, billions of consumer profiles, and hundreds of billions of interaction events, we are now making foundational investments in Marketing AI and Service AI to power next-generation agentic capabilities across our entire ecosystem.…
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