MooseStack by 514 is an open-source developer toolkit designed to enhance the developer experience (DX) for building data infrastructure with ClickHouse, addressing the convergence of data and software engineering. Traditionally, data infrastructure catered primarily to analysts with SQL-first workflows, but MooseStack shifts this approach to empower both data and software developers. It draws inspiration from modern web development practices, emphasizing a local-first, git-native approach with integrated CI/CD, and the use of native programming languages like TypeScript and Python instead of configuration files like YAML. This toolkit provides abstractions for infrastructure boilerplate, modular integration, and open-source flexibility, supporting the development of real-time analytics and AI-powered features. By offering a robust DX layer, MooseStack bridges the UX and DX gaps in data systems, enabling engineers to create efficient, scalable analytics applications with confidence and agility, akin to modern software development lifecycles.