A Dev C++ developer designs, codes, tests, and debugs software applications using the C++ programming language. They use Dev C++, an integrated development environment (IDE) for C++, to write and compile code. The developer's work includes creating algorithms, data structures, and using libraries for specific tasks. They also identify and fix bugs, ensuring the software runs smoothly. Moreover, they optimize code for performance, maintain software documentation for future reference, and may collaborate with other team members to create multifaceted software systems. They need solid problem-solving skills, a keen attention to detail, and a deep understanding of C++ programming.