Senior Product Manager, API's

Product Managers at Klaviyo are passionate about building products that delight customers and solve meaningful problems. Our ability to deeply understand customer needs and deliver products with strong product-market fit has been a major driver of Klaviyo’s success and rapid growth. Please note that this role is located in Boston and requires 3 days/week onsite in our office. Fully remote candidates will not be considered at this time. 

About the Role:

We’re now looking for a Senior Product Manager to lead the evolution of Klaviyo’s API platform—an essential pillar that empowers developers, partners, and technical users to build and integrate seamlessly with Klaviyo. As a Senior PM on the API team, you’ll play a central role in shaping the future of Klaviyo’s developer experience. You’ll work closely with engineers, designers, and cross-functional teams to build powerful, reliable, and developer-friendly APIs. Your work will directly impact how Klaviyo customers and partners access, manipulate, and activate customer data.

How You’ll Make a Difference:

• Drive business outcomes by defining and delivering high-impact API capabilities that expand Klaviyo’s reach and deepen integration opportunities.
• Own the roadmap for APIs across core domains—prioritizing based on impact, technical feasibility, and customer needs.
• Serve technical users by developing a strong point of view on the needs of developers, partners, and power users working with customer data at scale.
• Partner across the organization, working with other product teams to ensure our APIs are extensible, secure, and built with long-term scalability in mind.
• Communicate clearly and frequently, both in writing and in meetings, to align stakeholders and drive clarity on direction and priorities.
• Act as the voice of the developer, spending time with customers and partners to understand how they use Klaviyo’s APIs—and where we can do better.

What You'll Do:

• Manage a product roadmap for Klaviyo’s APIs—balancing new feature development, platform investments, and technical debt.
• Write clear, comprehensive specs that break down complex problems into detailed use cases, anticipate edge cases, and ensure a seamless developer experience.
• Work closely with engineering and design to iterate on API design and documentation, ensuring high usability and consistency.
• Ship features that deliver tangible value to customers and partners while maintaining high standards of quality and reliability.
• Continuously learn about emerging API standards, developer expectations, and partner needs to keep Klaviyo’s APIs modern and competitive.

Who You Are:

• You have 6+ years of experience in product management, ideally working on APIs, developer platforms, or data-focused products.
• You have strong technical intuition and are comfortable collaborating with engineers and understanding architectural trade-offs.
• You’re a rigorous thinker who enjoys breaking down complex problems and designing elegant, scalable solutions.
• You are customer-obsessed, especially about serving developers and technical users.
• You are an excellent communicator, particularly in writing, and can drive alignment across technical and non-technical stakeholders.
• You thrive in a fast-paced, high-growth environment and are motivated by solving hard problems with smart, collaborative teams.

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