A C++ Builds developer primarily handles the construction, testing, and maintenance of software using the C++ language. They write and debug code, develop algorithms and data structures, and ensure software integration with existing systems. They're also responsible for identifying and fixing software defects, optimizing code for performance, and managing memory effectively. They work closely with other developers, testers, and stakeholders to meet project goals. Their role also includes staying updated with the latest C++ standards and best practices. They may also develop automated build and testing protocols to streamline software development processes.