Senior Staff Software Engineer, Full Stack

Klaviyo is an intelligent marketing automation platform that helps businesses of all sizes create more personalized and impactful relationships with their customers. We are passionate about empowering businesses to own their marketing and customer relationships. Our platform enables companies to drive billions of dollars in revenue through our email, SMS, and in-app products.

At Klaviyo, we’re looking for humble and hungry individuals to help us build a world-class product. We're a technology company that empowers businesses to own their marketing and customer relationships. Our platform enables companies to drive billions of dollars in revenue through our email, SMS, and in-app products. We’re seeking exceptional technical talent to build the future of Klaviyo’s product. Come join our passionate, engaged, and fast-growing team!

We are seeking a Senior Staff Full Stack Software Engineer to join our growing team. As a Senior Staff Full Stack Engineer, you will lead the development of our next-generation customer engagement platform. You will be responsible for designing and implementing complex features across the entire stack, from front-end user interfaces to back-end services. You will also mentor junior engineers, contribute to architectural decisions, and ensure the scalability and reliability of our systems. This role requires strong problem-solving skills, a deep understanding of software engineering principles, and a passion for building innovative products.