A CongaMerge developer works on the Conga Suite, a document generation tool integrated with Salesforce. The developer creates customized templates for business documents such as contracts, proposals, and reports. They utilize Conga's features to merge data from Salesforce into these templates, automating the document creation process. They also troubleshoot issues and customize the tool according to user needs. Their role involves understanding business requirements, implementing solutions, and ensuring data accuracy. Additionally, they may also train users on using the tool effectively. They continuously innovate and improve the system for better efficiency and productivity.