Technologies: NestJS, PostgreSQL, MongoDB, Redis, RabbitMQ, Docker, Next.js • Developed enterprise resource planning platform with role-based access control (RBAC), multi-user authentication, and comprehensive authorization, serving 50+ users and processing 10+ daily orders • Implemented near real-time driver location tracking, inventory management with concurrency control, order processing, invoice generation, and payment tracking • Built automated Telegram bot notifications and integrated thermal printer for order fulfillment