A Klocwork developer uses the Klocwork software tool for static code analysis to identify potential bugs, vulnerabilities, and other issues in source code. They analyze, debug, and improve the quality and efficiency of the code. They also ensure the code complies with coding standards and best practices. In addition, they are responsible for integrating Klocwork into the software development process, configuring it to meet project requirements, and interpreting analysis results. They work closely with other software developers to address identified issues, contributing to the development of reliable and secure software applications.