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Senior Software Engineer - New Products

Klaviyo

$152,000 - $228,000
Oct 29, 2025
Boston, MA, US
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Klaviyo is looking to enhance its product offerings and support company growth by developing innovative end-to-end solutions using both front-end and back-end technologies, optimizing existing products, and creating new solutions.

Requirements

  • Strong experience developing end-to-end software solutions or extensive experience with both front-end and back-end technologies
  • Skills with Python and related technologies
  • Skills with React and related technologies
  • Experience developing digital marketing or customer data software solutions
  • Experience with machine learning
  • Experience building cloud-native solutions, ideally with AWS
  • Experience conducting code reviews and running a robust testing cycle

Responsibilities

  • developing innovative end-to-end solutions using both front-end and back-end technologies
  • optimize existing products
  • create new solutions that redefine what’s possible for our customers
  • develop multiple solutions
  • evaluate business and technical trade-offs to determine the best path forward
  • deploying well-designed, thoroughly tested solutions that ensure reliability and performance
  • driving key technology decisions

Other

  • 7+ years of experience in a software engineering role
  • Experience leading projects and being accountable for their outcomes
  • Experience mentoring team members or driving initiatives that help the team learn new skills
  • Experience working in agile, fast-paced environments
  • AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop)