Software Engineer II - Custom Objects

Klaviyo(6 hours ago)

HybridFull TimeMedior$116,000 - $174,000Engineering

About this role

Software Engineer II on the Custom Objects team at Klaviyo, building and scaling the platform that lets customers define, store, and evolve domain-specific data models. The role focuses on enabling safe modeling, querying, and activation of custom data to power personalization, segmentation, and analytics at scale.

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Required Skills

Backend
Data Structures
Algorithms
System Design
Databases
Data Storage
Stateful Systems
APIs
Data Pipelines
Python

+2 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.