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Software Engineer II - Flows & Insight Management

Klaviyo

$120,000 - $180,000
Oct 3, 2025
Boston, MA, US
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Klaviyo is looking for a Full Stack Engineer to support key initiatives that enhance our product offerings and drive company growth. In this role, you'll play a critical part in delivering end-to-end solutions using both front-end and back-end technologies. You’ll improve existing products and develop new capabilities that push the boundaries of what’s possible for our customers.

Requirements

  • Experience building end-to-end software solutions or deep experience with both front-end and back-end technologies
  • Familiarity with code reviews and leading or participating in robust testing practices
  • Experience with Python and related technologies
  • Experience with React and related technologies
  • Exposure to machine learning concepts or applications
  • Experience building cloud-native solutions, ideally on AWS

Responsibilities

  • delivering end-to-end solutions using both front-end and back-end technologies
  • improve existing products and develop new capabilities
  • tackle complex challenges, explore multiple solutions, and weigh business and technical trade-offs to determine the best path forward
  • actively contribute to team discussions and help shape important technology decisions
  • shipping well-designed, thoroughly tested solutions that prioritize reliability and performance
  • crafting an exceptional user experience for the Flows product area which empowers users to to build, manage, and analyze automated workflows seamlessly
  • manage APIs that integrate with other services, creating a powerful ecosystem for users to drive automation in new and exciting ways

Other

  • 3+ years of experience in a software engineering role
  • Experience working in agile, fast-paced environments
  • Background in digital marketing or customer data software
  • AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop).
  • We provide accommodations as needed.