A C++ & MATLAB developer designs, codes, tests, and debugs software applications and systems. They leverage C++ for system/application software, and MATLAB for numerical computing tasks, data analysis, algorithm development, and visualizations. They develop efficient and performance-sensitive algorithms using C++, while employing MATLAB for rapid prototyping, simulation, and modeling. They also ensure software integration with existing systems, modify or upgrade applications to maintain software functionality, and fix bugs. They often work in scientific, engineering, or financial domains, creating robust, high-performance solutions for complex computational problems. They must also document their code and the system functionality.