In This Video
Interview with Allen Chaves, Chief Technology Officer, shares the details of Klaviyo, and what it’s like to work there.
In this video interview, we discuss:
Who is Klaviyo?
Klaviyo is a Boston-based unified customer platform that empowers online brands to take direct ownership of their consumer data and digital interactions. Founded in 2012 by Andrew Bialecki and Ed Hallen, the company helps businesses build personalized, long-term relationships with their customers at scale through the smart use of first-party data. Klaviyo operates as one of the prominent anchor companies in the Boston technology ecosystem.
What products does Klaviyo build?
Klaviyo is built on a vertically integrated stack consisting of a data layer at the foundation, an intelligence layer in the middle, and a communication and personalization layer at the top. The platform provides various digital communication channels, including email, SMS, and push notifications. Additionally, Klaviyo offers customer data platform solutions and review management tools, all sitting on top of its unified data foundation to help brands understand customer behavior and deliver highly targeted campaigns.
What is the scale and market position of Klaviyo?
Klaviyo has established a major market presence with over 143,000 paying customers globally. The company employs approximately 1,500 people, who refer to themselves internally as Klaviyos. Klaviyo is headquartered in Boston and achieved a significant milestone by launching its initial public offering, transitioning into a publicly traded company.
How does Klaviyo implement artificial intelligence?
Klaviyo has integrated artificial intelligence directly into its platform through Klaviyo AI. This technology introduces natural language interfaces that allow users to manage complex actions using plain language, such as generating customer segments on the fly. Beyond simplification, Klaviyo AI is designed to suggest proactive marketing strategies, forms, and insights on behalf of brands to optimize their customer interactions.
What engineering challenges are solved at Klaviyo?
Engineers at Klaviyo work on a high-throughput platform that requires solving complex data ingestion and processing problems at scale. This includes managing fast set operations and performant list merges. To achieve full data ownership and maximize deliverability, the Klaviyo engineering team built its own proprietary email infrastructure, which successfully handles massive transaction volumes during peak shopping events like Black Friday and Cyber Monday.
What is the company culture like at Klaviyo?
The culture at Klaviyo is defined by a strong emphasis on continuous learning and an egoless, collaborative environment. The company actively encourages professional development, providing employees with an unlimited book policy and opportunities to attend professional conferences. Employees work in cross-functional teams where knowledge sharing and mutual support are highly prioritized to solve scaling challenges.
Why should tech job seekers choose Klaviyo?
Klaviyo offers job seekers the opportunity to solve highly complex, large-scale technical and operational challenges within a fast-growing and sustainable business. Because of the rapid expansion of the platform, employees across all departments are given high levels of ownership over critical projects. Klaviyo combines a supportive, learning-oriented culture with the career-growth potential of an established, publicly traded tech anchor.


