✦ Luna Orbit — Software Engineering

Senior Software Engineer - Profiles, Lists and Segments

at Klaviyo

📍 Boston, MA Onsite Posted March 18, 2026
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Position Details

Type Full-Time
Experience senior
Exp. Years 5+ years
Education Not specified
Category Software Engineering

About this role

This role involves designing and building scalable full-stack systems for customer data management at Klaviyo, focusing on frontend components and backend APIs.

Key Responsibilities

  • Design scalable systems
  • Build customer-facing features
  • Collaborate with product teams
  • Mentor junior engineers
  • Ensure high-quality code

Technical Overview

Stack includes React, TypeScript, Python, Django, RESTful APIs, GraphQL, with emphasis on automated testing and SaaS environment.

Ideal Candidate

The ideal candidate is a senior full-stack software engineer with at least 5 years of experience in React, Python, and Django, capable of designing scalable frontend and backend systems. They should be proficient in automated testing and API development, with a collaborative mindset.

Must-Have Skills

ReactTypeScriptPythonDjangoRESTful APIsGraphQLautomated testing

Nice-to-Have Skills

ReduxCypressPytestAI

Tools & Platforms

ReactTypeScriptPythonDjangoCypressPytest

Required Skills

ReactTypeScriptPythonDjangoRESTful APIsGraphQLautomated testingCypressPytest

Hard Skills

TypeScriptReactReduxJavaScriptHTMLCSSPythonDjangoRESTful APIsGraphQLAutomated testingCypressPytest

Soft Skills

collaborationmentoringproblem-solvingownershipteamwork

Industry & Role

Industry SaaS
Job Function Develop and maintain scalable full-stack customer data platform components
Role Subtype Full Stack Engineer
Tech Domains React, TypeScript, Python, Django, RESTful APIs, GraphQL

Keywords for Your Resume

Senior Software Engineerfull-stack developmentReactTypeScriptPythonDjangoRESTful APIsGraphQLautomated testingCypressPytestsoftware engineeringSaaScollaborationmentoringownershipfull-stack

Deal Breakers

Lack of experience with React or Python, No experience with automated testing frameworks, Less than 5 years of experience, Not willing to work onsite in Boston

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