The SMS Delivery enables our customers to confidently select the right sender IDs for their marketing needs-and to register and activate those IDs through a single, intuitive, and transparent workflow. The experience is designed to be cross-channel, eliminate redundant data entry, and get customers up and sending messages quickly while meeting defined SLAs. As regulations evolve, we ensure our customers remain fully informed and compliant with all new and changing requirements. .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 all the editors. 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 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 managing senders, across multiple channels and incorporating more api driven way to editor interfaces 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.