An HPALM developer is responsible for managing and maintaining the HP Application Lifecycle Management (ALM) software, a tool used for project management, quality assurance, and software testing. They design, develop, and execute test plans and scripts using HP ALM. They also manage defects, track progress, generate reports, and ensure the software's functionality aligns with the user requirements. They coordinate with different teams, like developers and stakeholders, to ensure the software's effectiveness. Their role is crucial in the software development lifecycle as they ensure the product's quality and efficiency before its release.