Software Engineer II Devx

Klaviyo(1 month ago)

HybridFull TimeMedior$120,000 - $180,000Engineering

About this role

An engineer on Klaviyo’s DevX team supporting external developers and partners by enabling applications built on Klaviyo’s Public APIs and developer-facing tools. The role sits within a product–platform team focused on the app marketplace, developer docs/SDKs/CLIs, and API analytics, contributing to Klaviyo’s real-time data platform. Klaviyo is a fast-growing company that builds on AWS and Python at massive scale and emphasizes collaboration and technical ownership.

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Required Skills

Python
Django
FastAPI
React
React Query
MySQL
PostgreSQL
DocumentDB
ClickHouse
JSON Forms

+12 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.