Full-stack Software Engineer Intern (Summer 2026)

Klaviyo(8 days ago)

Boston, MAOnsiteInternshipIntern$106,000 - $106,000Engineering

About this role

A Full-stack Software Engineering Intern at Klaviyo will join the Engineering organization to build and scale features that power marketing and data products used by thousands of customers. Interns are embedded on engineering teams, work on production projects across frontend and backend systems, and are encouraged to use AI tools while learning from experienced engineers. The role runs as an 11-week paid summer program based at Klaviyo’s Boston headquarters.

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Required Skills

Python
Django
TypeScript
React
MySQL
Cassandra
Clickhouse
Kafka
Redis
AWS

+2 more

Qualifications

Pursuing Degree in Computer Science or Related Field
Graduating Dec 2026 or May/June 2027

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.