A CiviCRM developer specializes in designing, maintaining, and improving the CiviCRM open-source software that assists nonprofits, advocacy groups, and NGOs in managing their relationships with constituents. They are responsible for customizing the software according to the organization's needs, integrating it with other systems, and troubleshooting any technical issues. They also work on enhancing the software's functionalities by developing and implementing modules, extensions, or plugins. A CiviCRM developer's role also includes ensuring data integrity, security, and privacy. They often collaborate with other team members to understand requirements, provide technical support, and train users to efficiently use the system.