RetailInventa 360 is a multi-tier AWS architecture combining FastAPI backend, ML-driven demand prediction, and NLP chat assistance across three availability zones. Shop owners and employees interact via Flutter mobile app, which routes requests to Python FastAPI on t3.medium instances in the backend subnet, orchestrating MySQL database operations, AI model serving, and analytics dashboards. The system demonstrates high-availability patterns with MySQL primary-standby replication across separate data subnets, isolated ML and reporting workloads in dedicated subnets, and CloudWatch monitoring throughout. This architecture solves inventory visibility, demand forecasting, and customer support challenges while maintaining fault isolation and cost efficiency through right-sized EC2 instances. Fork this diagram on Diagrams.so to customize VPC CIDR blocks, add auto-scaling policies, or integrate additional AWS services like RDS Proxy or Lambda for event-driven workflows.