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The Editors team is the owner of Klaviyo’s browser based email template editor. This team focuses on building intuitive and powerful interfaces to create highly customizable and dynamic content ranging from product feeds, real time event data, and more. This product area is core to Klaviyo’s continued success. As a Senior Software Engineer on the team, you’ll play a key role in designing and building scalable systems that power our editor experiences across mobile channels. Partnering closely with product managers and technical product owners, you’ll help define scope, translate ideas into practical implementations, and build intuitive editing tools that delight our users. This role leans frontend, with a strong focus on crafting thoughtful, reusable components and seamless user experiences using technologies like TypeScript, React, Python, and Django. There are ample opportunities for growth given the scope of this role and the team’s central role in Klaviyo’s product. Over the past year, our team has enhanced the email editor with impactful features that our customers love—and they’re eager to see that same power brought to other mobile experiences. Looking ahead, we’ll be investing in new editor blocks, a personalization builder, in-canvas editing, and content generation powered by AI. You’ll contribute directly to these efforts, helping Klaviyo extend its best-in-class editing tools across platforms. How You Will Make a Difference: You will be a core member of the Editors team, working on impactful customer-facing features that will make our product the best in the industry. You will work on creating easy-to-use editors that are highly performant. You will work closely with Product, Design, and Data Science to provide the best experience for our customers. Who You Are: 5+ years of full stack - frontend leaning - software engineering experience Strong hands-on React and Redux skills Skills with Python and Django or similar technologies Strong desire to learn and not afraid of a challenge Excited to be collaborative and share any knowledge learned with teammates Ownership of requirements, edge cases, and testing Able to work out of our Boston, MA office 3x/week Technologies We Use (not exhaustive): React, TypeScript, Redux Python, Django MySQL, RabbitMQ, Redis, ProxySQL Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, and other DevOps tools

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