Owned backend architecture and API development for a gym management web platform, implementing JWT auth, RBAC, membership workflows, attendance validation, payments, and performance-focused REST services in a collaborative React + Node.js environment.

Developed a comprehensive real-time notification system for CRM, featuring priority-based delivery, user-customizable preferences, and secure multi-channel integration using React.js, Node.js, MongoDB, Firebase, cron jobs, and priority queues.

Contributed to building the admission portal integrated with the ERP system. Developed frontend and backend features including online applications, document uploads, fee payments, real-time tracking, and an admin panel to streamline operations and improve user experience. Coordinated with stakeholders and teams, and recommended a centralized authentication system to enhance security.

Contributed to building a recruitment platform to streamline hiring, featuring role-based responsive interfaces, job posting management, resume uploads, and application tracking using React.js, Node.js, and MongoDB.