A Flash ActionScript developer designs and implements interactive elements for websites using Adobe's Flash software. They write and test codes in ActionScript, the programming language used in Flash. They create animations, video games, apps, and other interactive multimedia content. They often work with graphic designers and other developers to integrate visual and audio components. They also troubleshoot and debug any issues to ensure smooth functionality. Additionally, they optimize the performance and efficiency of applications, ensuring they are compatible across different browsers and platforms. They may also be involved in maintaining and updating existing Flash applications.