Klaviyo

Software Engineer II - Flows Experience

Klaviyo
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3 days ago
Boston, MA, USAMid Level
H1B sponsor

Base Salary

$116k - $174k/yr

Responsibilities

  • Own major parts of the Flows product from design through launch and operation.
  • Design and evolve public and internal Flows APIs used by customers, partners, developers, and AI agents.
  • Improve performance and reliability for large flows and large accounts, including canvas rendering, analytics queries, APIs, and queues.
  • Build validation, safe defaults, clear feedback, and recovery mechanisms to prevent costly workflow mistakes.
  • Partner with Flows Platform on the contract between the product and the flow engine.
  • Contribute technical leadership through design reviews, mentorship, operational excellence, and AI-assisted development.

Requirements

  • Experience building and shipping customer-reliable products with strong attention to user experience.
  • Strong full-stack ability, with deep expertise in complex frontend applications, API design, or backend performance and comfort across the other areas.
  • Ability to solve problems at the intersection of user experience and systems performance.
  • Ability to iterate using early releases, data, and customer feedback while collaborating with product and design.
  • Ability to work autonomously, own outcomes, and collaborate broadly on a small team.
  • Curiosity about how AI changes both product development and software development.

Benefits

  • Onsite work in Boston, Massachusetts five days per week.
  • Base salary range of $116,000–$174,000 across U.S. locations, varying by skills, experience, education or training, and work location.
  • Potential annual cash bonus, equity, sign-on payments, and health, welfare, and wellbeing benefits based on eligibility.
  • Up to 10% travel may be required for onboarding, client or partner work, team meetings, and industry events, coordinated in advance.

Categories

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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