A C developer designs, develops, tests, and debugs software applications and systems using the C programming language. They write efficient and maintainable code, optimize software for better performance, and troubleshoot issues to improve software functionality. They also collaborate with other developers, software architects, and product managers to understand user needs and translate them into technical requirements. Additionally, they perform code reviews, ensure compliance with coding standards, and document software specifications. Their role may also involve researching new technologies to stay updated with the latest industry trends and enhance the quality of their software solutions.