Senior Product Designer, Design Systems

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny. About the role At Klaviyo, we're building the platform that helps businesses create and deliver personalized customer experiences at scale, powered by first-party data. We’re looking for a Senior Product Designer to join the Design System team and help evolve Ascent, Klaviyo’s design system. You'll define and scale the reusable components, patterns, tokens, documentation, and standards that help teams ship faster, creating a more consistent and usable product experience across Klaviyo. This role sits at the intersection of product design, engineering, and systems thinking. You'll partner across product teams to improve design-to-code parity, drive adoption, and use AI and automation to reduce manual friction while maintaining a high bar for quality, accessibility, and system integrity. What you'll do Evolve Ascent's components, patterns, tokens, interaction standards, and documentation across Klaviyo's product surfaces. Partner with engineering to improve design-to-code parity and ensure coded components reflect design intent. Identify inconsistencies, gaps, and duplicated patterns across product teams, then turn them into scalable system improvements. Own the end-to-end design process from conceptualization to discovery, and in some cases all the way to implementation. Support adoption through clear guidance, design critiques, spec reviews, office hours, workshops, and release communications. Use AI and automation to accelerate prototyping, docume