An HP Fortify developer primarily focuses on implementing and managing HP Fortify, a software designed to identify security vulnerabilities in coding. They work with software developers to ensure secure coding practices are followed. They also conduct threat and risk analysis, generate reports detailing security vulnerabilities, and suggest mitigation strategies. Their responsibilities include configuring and maintaining HP Fortify software, integrating it into the development process, and training other members in its use. Thus, they play a crucial role in enhancing the security of the software development lifecycle, helping to protect against potential security breaches.