Sr. Lead Software Engineer is open at Klaviyo in Boston. The posting gives no salary; similar roles in the United States advertise a median of $238K. Posted on Oct 16, 2026, and still on Klaviyo’s careers page when we last checked, on Nov 14, 2026.
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…
The opening lines of the posting. The rest is on Klaviyo’s careers page.
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