Charles Catta developed and delivered Billing Client v2 for the botpress/botpress repository, focusing on enhancing invoice management and automating billing workflows. Working primarily with TypeScript, he integrated the new client with existing APIs to streamline revenue operations and reduce manual billing steps. The solution introduced modular client versioning and improved reliability in billing processes, enabling faster revenue recognition for users. Charles collaborated closely with François Levasseur and other teams to ensure seamless integration and adoption. His work demonstrated strong skills in API development and client-side engineering, addressing the need for more automated, maintainable, and efficient billing operations within the platform.