A Flux Architecture developer designs and implements data flow architecture for web applications, primarily using Facebook's Flux design pattern. This involves creating stores to hold application state, dispatchers to manage data flow, and actions to trigger changes. They ensure unidirectional data flow, enhancing application predictability, and stability. They work closely with React components, ensuring seamless interaction between user interfaces and underlying data structures. Their responsibilities also include debugging, testing, optimizing the architecture, and maintaining up-to-date documentation. They need strong JavaScript skills, understanding of asynchronous programming, and familiarity with various Flux implementations like Redux.