Software Engineer I — AI-First, Ownership from Day One

Klaviyo Campus; Boston (MA); On-site; USD 104,000 - 156,000; Full time

Job summary

Klaviyo in Boston is seeking a Software Engineer I to join our early‑career ranks. You'll write, test, and deploy code for features used by thousands of paying customers, working on scalable systems and AI‑enhanced workflows in a fast‑paced, product‑driven environment.

This role offers hands‑on learning, collaboration with experienced engineers, and opportunities to grow across the stack from back‑end to front‑end. Graduates or new grads joining in Dec 2026 to May/June 2027 encouraged to apply.

Qualifications

• Two internship/co-op roles with production‑level code.
• Pursuing a degree in Computer Science, Engineering, Data Science, Math/Statistics, or related field.
• Graduating in December 2026 or May/June 2027.
• Experience with Python, Django, Typescript, React, Go.
• Experience with MySQL, Cassandra, Clickhouse, Kafka, Redis.
• Experience with AWS (EC2, RDS, Aurora), Terraform.

Responsibilities

• Own features that our 180K+ paying customers rely on daily to reach their consumers and grow their business.
• Take responsibility for the mission, technical direction, and operation of projects with immediate impact.
• Own the full lifecycle of your code: writing it, testing it, shipping it, and making it better over time.
• Build and ship features that meet a high bar and grow your technical skills while you do it.
• Get hands‑on debugging real issues, both locally and in production.
• Contribute to documentation and support your team during incidents.
• Work closely with your teammates: ask questions, share ideas, and get better by taking feedback seriously.

Skills

Python

Django

Typescript

React

Go

Education

Pursuing CS/Engineering/Data Science degree

Tools

MySQL

Cassandra

Clickhouse

Kafka

Redis

AWS

Terraform

Job description

Klaviyo in Boston is seeking a Software Engineer I to join our early‑career ranks. You'll write, test, and deploy code for features used by thousands of paying customers, working on scalable systems and AI‑enhanced workflows in a fast‑paced, product‑driven environment.

This role offers hands‑on learning, collaboration with experienced engineers, and opportunities to grow across the stack from back‑end to front‑end. Graduates or new grads joining in Dec 2026 to May/June 2027 encouraged to apply.