Principal 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 7, 2026, and still on Klaviyo’s careers page when we last checked, on Nov 14, 2026.
About the role
Design and implement core data platform capabilities (e.g., event ingestion/CDC, stream processing, batch orchestration, data lake/warehouse patterns, catalog/lineage, governance, access, and compliance). - Define and uphold SLOs for data freshness, availability, and correctness; author/run readiness reviews, incident response, and post‑incident learning for your domain. - Author ADRs/RFCs, land data contracts and…
The opening lines of the posting. The rest is on Klaviyo’s careers page.
Hiring at Klaviyo
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