✦ Luna Orbit — Software Engineering

Software Engineer II - WhatsApp

at Klaviyo

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

Type Full-Time
Experience mid
Exp. Years 3+ years
Education Not specified
Category Software Engineering

About this role

Support the development of WhatsApp messaging features at Klaviyo by building reliable, scalable, and high-quality software solutions across front-end and back-end systems.

Key Responsibilities

  • Develop end-to-end solutions
  • Improve existing products
  • Participate in code reviews and testing
  • Collaborate with cross-functional teams
  • Ship reliable, well-tested code

Technical Overview

Full stack development using JavaScript, React, Python, with agile methodologies, code reviews, and testing practices to ensure product quality and performance.

Ideal Candidate

The ideal candidate is a mid-level software engineer with 3+ years of experience in full stack development, proficient in JavaScript, React, and Python, with a strong understanding of agile methodologies and testing practices.

Must-Have Skills

building high-quality productswriting cleanmaintainable codeend-to-end software solutionsexperience in a software engineering rolefamiliarity with code reviewstesting practices

Nice-to-Have Skills

PythonReactdigital marketingMeta template management

Tools & Platforms

MetaWhatsApp

Required Skills

building high-quality productswriting cleanmaintainable codeend-to-end software solutionsexperience in software engineeringcode reviewstesting practicesReactPythonJavaScriptagileWhatsAppMeta

Hard Skills

JavaScriptReactPythonAgileCode reviewsTesting practicesFull stack development

Soft Skills

communicationcollaborationproblem-solvingadaptabilityteamwork

Industry & Role

Industry SaaS
Job Function Full stack software development for messaging platform
Role Subtype Full Stack Engineer
Tech Domains JavaScript, React, Python

Keywords for Your Resume

software engineerfull stack engineerJavaScriptReactPythonagilecode reviewstesting practicesWhatsAppMetaon-sitesoftware developmentend-to-end solutionshigh-quality productsmaintainable codefull stacktesting

Deal Breakers

Lack of experience in full stack development, No experience with React or Python, Unfamiliarity with agile practices, No experience in messaging platforms

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