Internship on a full-stack, WhatsApp-class conversational product — threaded messaging, persistent history, and operator-grade surfaces — built on ProGamma's enterprise JavaScript application framework with MySQL as the transactional backbone. The work cut across delivery and design: articulating how client modules, service boundaries, and relational schemas lock together, then engineering data pipelines that move conversational payloads from ingest through normalization, storage, and read paths without sacrificing auditability or referential integrity.