A Cubase developer is responsible for the design, development, and maintenance of Steinberg's Cubase software, a digital audio workstation used for music recording, arranging, and editing. They write and debug code, often in languages like C++ or Python, to create new features, improve existing ones, or fix software bugs. Additionally, they collaborate with other developers, sound engineers, and designers to ensure the software meets user needs and industry standards. They must also stay updated with the latest audio technology trends and programming practices. They may also provide technical support and create documentation for users.