Senior Frontend Engineer — Profiles & Segments

Klaviyo Inc.; Boston (MA); Hybrid; USD 148,000 - 222,000; Full time

Benefits offered by this job

Health benefits

Equity

Annual bonus

Sign-on payments

Job summary

Klaviyo Inc. is seeking a Senior Software Engineer for the PLS team in the US. The role focuses on frontend-heavy, scalable systems using TypeScript, React, Python and Django.

You will partner with Product, Design and Data Science to translate complex data and UX problems into practical implementations, building reusable components and high-quality workflows. You will contribute to customer data experiences (profiles, lists and segments) that power targeting, personalization, and measurement,

Qualifications

• 5+ years of experience in full-stack development with strong hands-on skills in React, Redux, JavaScript, HTML, and CSS.
• Experience delivering and shipping work powered by or accelerated through AI.
• Experience conducting code reviews and robust testing with automated tests (end-to-end/integration tests).
• Experience with RESTful and GraphQL APIs, and evolving APIs and data models to support product success.

Responsibilities

• Own critical features for customer data experiences (profiles, lists and segments).
• Build easy-to-use editors with high performance.
• Collaborate with Product, Design and Data Science to enhance user experience.
• Mentor teammates and drive learning initiatives.

Skills

React

Redux

JavaScript

HTML

CSS

TypeScript

End-to-end testing

GraphQL

REST APIs

Python

Django

AWS

Terraform

MySQL

Redis

RabbitMQ

Tools

Cypress

pytest

EC2

RDS

Aurora

S3

Terraform

Job description

Klaviyo Inc. is seeking a Senior Software Engineer for the PLS team in the US. The role focuses on frontend-heavy, scalable systems using TypeScript, React, Python and Django.

You will partner with Product, Design and Data Science to translate complex data and UX problems into practical implementations, building reusable components and high-quality workflows. You will contribute to customer data experiences (profiles, lists and segments) that power targeting, personalization, and measurement,