A Lotus Domino Development developer designs, implements, and maintains applications using IBM's Lotus Notes/Domino platform. They utilize LotusScript and Formula languages to create custom applications that enhance collaboration and data management within an organization. They also handle database replication, security settings, and workflow management. Developers can integrate Domino applications with other systems, ensuring seamless data exchange. They troubleshoot issues, optimize performance, and provide technical support to users. Additionally, they may be involved in upgrading or migrating existing Domino applications to new platforms or technologies. Constant learning and staying updated with emerging trends in Domino technology is also part of their role.