A Lua developer primarily writes, tests, and debugs applications and software using the Lua programming language. They often design algorithms, troubleshoot code, optimize system performance, and integrate Lua with other languages. They are involved in all stages of the software development life cycle, from conceptualization to final testing. Lua developers also often collaborate with other developers, stakeholders, and clients to understand their needs and translate them into functional software. They frequently work in gaming, web development, or embedded systems. Their role requires a deep understanding of Lua syntax and semantics, as well as problem-solving skills.