Senior Software Engineer

Klaviyo

1 month ago

3.3 on Glassdoor

Boston, MA

Hybrid

Full Time

Senior

0 applicants

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About this role

A Senior Software Engineer on Klaviyo’s DevX team focused on building and scaling developer-facing systems that support third-party applications on Klaviyo’s platform. The role centers on the app marketplace, application publishing workflows, developer tooling, and API analytics built on a real-time Python/AWS data platform. Engineers collaborate across product and platform teams to shape the direction of the developer ecosystem.

Skills

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.