A CoronaSDK developer designs and creates applications for mobile and desktop platforms using the Corona Software Development Kit (SDK). They write, test, and debug code, ensuring it's functional and user-friendly. Their work involves designing UI, integrating APIs, and managing databases. They also optimize app performance and troubleshoot any issues. As CoronaSDK supports Lua, a lightweight scripting language, developers must be proficient in it. They often work in teams, collaborating with designers, testers, and other developers, and must keep up-to-date with new technologies and programming languages. Besides, they might be involved in deploying apps to different platforms like iOS, Android, and Windows.