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 careers.klaviyo.com to see how we empower creators to own their own destiny. Klaviyo’s Marketing Agent team is building the next generation of intelligent tools that help businesses craft and execute powerful, personalized marketing strategies with minimal effort. This is a fast-paced, high-visibility initiative and powered by state-of-the-art technology. You’ll be part of a team creating products that support Klaviyo’s customers in driving key business outcomes through automated strategy generation. As a Senior Software Engineer on this team, you’ll focus on frontend development building dynamic, user-facing interfaces that simplify complex workflows. You’ll partner closely with design, product, and data teams to build highly interactive, intuitive frontend experiences while contributing across the full stack. You’ll help design, implement, and iterate on a new class of features that leverage AI, including LLMs and agentic workflows, to support marketing execution end-to-end.