A Debugger developer's primary role is to identify and correct errors or bugs in software programs. They analyze and understand the codebase, use debugging tools to systematically test the various segments of the software, and pinpoint where the issues occur. Once the bugs are identified, they modify, enhance, or rewrite the problematic code to resolve the issues, ensuring the software operates as intended. They also document the debugging process, explaining the nature of bugs and the steps taken to fix them. Additionally, they often work closely with other developers and software testers to optimize the software's performance.