Principal Engineer, Enterprise Scalability

Klaviyo(1 month ago)

HybridFull TimeSenior$248,000 - $372,000Engineering

About this role

Senior individual contributor on the Klaviyo engineering team responsible for driving company‑wide scalability, reliability, and multi‑region readiness. Reports to the VP of Engineering and leads cross‑org initiatives through technical depth and influence rather than direct reports. The role focuses on aligning teams, shaping platform architecture, and ensuring large‑tenant and enterprise readiness while integrating AI to improve resiliency and operational outcomes.

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Required Skills

Performance Engineering
Capacity Planning
Sharding
Partitioning
Caching
Back Pressure
Multi Region
Migrations
Benchmarking
Profiling

+7 more

About Klaviyo

klaviyo.com

Klaviyo is a B2C CRM and marketing automation platform that unifies AI-powered email and SMS to help ecommerce brands drive growth and retention. It uses customer data, advanced segmentation, and automation flows to deliver personalized, omnichannel experiences across email, SMS, WhatsApp, and more — including AI-driven capabilities via K:AI Agents. Klaviyo emphasizes measurable results with analytics, testing, and integrations with major ecommerce platforms to boost revenue and lifetime value. Companies use it to build targeted lifecycle campaigns, personalized messaging, and data-driven retention strategies at scale.