Generally, the jobs that require the knowledge of C programming language fall within the software developer and software engineer category. Although C is essential for computing throughout the world, it is mostly used for low-level software development. As a result, jobs needing C programming experience are at organizations that develop or maintain applications that need micro-optimization and fine-tuning and that afford to compromise on performance. According to Indeed.com, C developers in the United States earn an average annual salary of $106,320.