During this period, work centered on enhancing stability and reliability across three repositories, including yuntasproducciones/tami-back-teams and yuntasproducciones/Yuntas. The developer addressed critical bugs affecting WhatsApp message delivery and email template workflows, focusing on robust error handling, improved observability, and transaction management. Using PHP, JavaScript, and Laravel, they ensured WhatsApp numbers were formatted correctly for delivery and refined the email template editor to process submissions accurately, provide clearer user feedback, and support safer template updates. These targeted fixes reduced downtime, improved user guidance, and strengthened backend and frontend integration, contributing to more dependable communication features for end users.