Application architecture design, Azure cloud platform, modern web application, scalable infrastructure, microservices, containerized deployment, Kubernetes orchestration, Azure Kubernetes Service (AKS), load balancer, autoscaling, virtual network, subnet, security group, Azure Active Directory (AAD) integration, identity and access management, data storage, Azure Blob Storage, Azure Cosmos DB, NoSQL database, real-time analytics, Azure Stream Analytics, machine learning model, Azure Machine Learning, predictive maintenance, IoT device integration, Azure IoT Hub, monitoring and logging, Azure Monitor, Application Insights, Azure Security Center, threat detection, penetration testing, disaster recovery plan, backup and restore strategy, high availability architecture, fault-tolerant system, 3-tier architecture, presentation layer, application layer, data access layer, RESTful API design, Azure API Management, Swagger documentation, OpenAPI specification.