Klaviyo

Senior Software Engineer, Customer Agent

Klaviyo
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3 months ago
Boston, MA, USASenior
H1B sponsor

Base Salary

$148k - $222k/yr

Responsibilities

  • Design, build, and scale systems powering intelligent workflows, conversational experiences, tool integrations, retrieval systems, onboarding flows, observability, and multi-channel customer engagement.
  • Develop foundational platform capabilities and customer-facing experiences for highly configurable AI agents.
  • Evaluate technical and architectural trade-offs and contribute to foundational platform decisions.
  • Lead projects, drive engineering quality and execution, and remain accountable for technical and business outcomes.
  • Mentor engineers and help drive initiatives that improve team capabilities.
  • Deploy reliable, scalable, thoroughly tested solutions with strong customer impact.
  • Improve the intelligence and reliability of Customer Agent experiences.

Requirements

  • 7+ years of experience in a software engineering role.
  • Strong end-to-end software development experience across front-end and back-end technologies.
  • Proven experience building scalable, customer-facing systems in fast-moving product environments.
  • Experience leading projects and owning technical and business outcomes.
  • Experience mentoring team members or driving team learning initiatives.
  • Experience with code reviews and robust testing and deployment practices.
  • Practical experience experimenting with LLMs, AI tooling, or agentic workflows in professional or personal projects.
  • Strong product mindset and ability to collaborate cross-functionally on ambiguous problems.
  • Python experience is preferred.
  • React experience is preferred.
  • Experience with conversational AI systems, workflow engines, agentic platforms, retrieval systems, embeddings, evaluation frameworks, or LLM orchestration is preferred.
  • Experience building cloud-native solutions, ideally with AWS, is preferred.
  • Experience with machine learning systems, AI infrastructure, multi-tenant SaaS platforms, observability, tracing, experimentation, or AI quality and evaluation tooling is preferred.

Benefits

  • Comprehensive health, welfare, and wellbeing benefits based on eligibility.
  • May require up to 10% travel for onboarding, client or partner work, team meetings, and industry events.
Klaviyo

About Klaviyo

1,001-5,000 employees

Klaviyo builds a subscription SaaS platform that lets e-commerce and consumer brands use first-party data to run targeted email, SMS, and push campaigns, with built-in automation and analytics. The product also includes B2C CRM features for segmentation, A/B testing, and customer lifecycle workflows. Founded in 2012 and headquartered in Boston, it is a public company (NYSE: KVYO) used by brands such as Mattel and Glossier.

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