Enterprise Architecture: Food Delivery Platform on Azure

Enterprise Architecture: Food Delivery Platform on Azure

1. Business Use Case

Build a scalable, secure, cloud-native food delivery platform with high availability, microservices architecture, and seamless integrations.

2. Key Capabilities

• User Management

• Restaurant Management

• Menu Browsing

• Order Placement & Tracking

• Delivery Assignment

• Payments & Wallet

• Customer Support

• Notifications

• Feedback & Reviews

• Fraud Detection & Alerts

3. Microservices

Each capability is implemented as a Spring Boot microservice:

• user-service

• restaurant-service

• menu-service

• order-service

• delivery-service

• payment-service

• wallet-service

• notification-service

• support-service

• review-service

• fraud-detection-service

• reporting-service

• auth-service (SSO with Azure AD)

4. Azure Cloud Integration Components

Category	Azure Service	Purpose
Subscription & Networking	Azure Subscription, VNet, Subnets	Logical boundaries, connectivity
Security	Azure AD, NSG, Azure Firewall	Identity & access control, network segmentation
Ingress & Load Balancing	Traffic Manager, Application Gateway (WAF), Istio	Geo-distribution, SSL termination, service mesh
Compute	AKS (Kubernetes Service), Docker	Container orchestration
Storage & DB	Azure SQL, Cosmos DB, Blob Storage	Structured/unstructured data
Messaging & Events	Kafka, Azure Event Hub, Service Bus	Async messaging/event streaming
API Gateway	Azure API Management (APIM)	Central API exposure & governance
Monitoring	Azure Monitor, Application Insights, Log Analytics	Logging, metrics, alerting
CI/CD	Azure DevOps, ACR	Build pipelines, image registry
Security Extensions	Managed Identity, Key Vault	Secret & credential management

5. Flow Walkthrough: Food Order

1. Customer Onboarding

   • Sign-up via auth-service

   • SSO using Azure AD B2C

   • Profile stored in Azure SQL via user-service

2. Browse Menu

   • menu-service pulls data from Azure SQL/Cosmos DB

   • API exposed via APIM

3. Place Order

   • order-service calls restaurant-service and inventory-service

   • Order stored in Azure SQL; Kafka event triggered

4. Payment Processing

   • payment-service validates wallet/bank

   • Secure calls using Managed Identity

5. Delivery Allocation

   • delivery-service consumes Kafka event

   • Allocates rider & updates status

6. Notifications

   • notification-service triggers email/SMS via Kafka events

7. Feedback & Reviews

   • review-service stores feedback

   • Exposed via APIM

6. Service Mesh with Istio

• Secure service-to-service communication

• Traffic shaping, retries, timeouts, mTLS

• Ingress Gateway integrated with Azure Application Gateway

7. High-Level Security Setup

• Azure AD for SSO & microservices auth

• API Management with throttling, quotas, and subscriptions

• Istio for mTLS, routing, observability

• Application Gateway with WAF for OWASP top 10

• Firewall & NSG to isolate and control traffic

• SSL configured at load balancer level

• Managed Identity + Key Vault for secrets

8. Resilience & HA

• Multi-AZ AKS setup

• Traffic Manager for global routing

• Auto-scaling with AKS

• Retry logic + Circuit Breaker at service level

9. Risk Categories & Mitigation

Category	Risk Example	Mitigation
Business	High demand spikes	Auto-scaling, caching, queuing
Operational	Delivery delays	Real-time tracking, route optimization
Environmental	Data center outage	Multi-region AKS & SQL
Technology	Service failure	Circuit breaker, retries, health checks
Security	Data breach	mTLS, WAF, Azure AD, token validation
Compliance	GDPR violations	Encryption at rest/in-transit, PII redaction
People	Insider threat	Role-based access control, audit logs

10. Capability → Service → Application Mapping

Capability	Service	Application/API
Order Placement	order-service	/orders
Payments	payment-service	/payments
Notifications	notification-service	/notify
Fraud Detection	fraud-detection	/fraud-check