Architecture diagram examples are real-world visual templates that illustrate how software systems are structured, including their components, data flows, and infrastructure. Engineers, architects, and technical writers use these examples as starting points to document microservices, serverless pipelines, CI/CD workflows, and other common patterns quickly and accurately.
Looking for architecture diagram examples you can actually use? Below are 10 real-world examples covering the most common system architectures engineers build today. Each example includes the natural language prompt you can paste directly into ArchitectureDiagram.ai to generate your own version instantly.
1. Three-tier web application
The classic architecture for most web applications. A frontend communicates with a backend API, which connects to a database.
"A React frontend hosted on Vercel sends API requests to a Node.js/Express backend running on AWS ECS. The backend connects to a PostgreSQL database on RDS and uses Redis for session caching. Static assets are served through CloudFront CDN."
2. Microservice architecture
Multiple independently deployable services communicating through an API gateway and message broker.
"An API Gateway routes requests to four microservices: User Service, Product Service, Order Service, and Payment Service. Each service has its own PostgreSQL database. Services communicate asynchronously through RabbitMQ. The Order Service publishes order events that the Payment Service and a Notification Service consume."
See also: Microservice architecture diagrams
3. Serverless event-driven architecture
A fully serverless system where managed services handle all infrastructure concerns.
"API Gateway receives requests and triggers Lambda functions. The Lambda writes order data to DynamoDB and publishes an event to EventBridge. EventBridge routes to three targets: an SQS queue for email notifications (processed by another Lambda), a Step Functions workflow for order fulfillment, and a Kinesis stream for real-time analytics. Failed events go to a dead letter queue."
4. CI/CD pipeline
A continuous integration and deployment pipeline from code commit to production.
"Developer pushes code to GitHub. GitHub Actions triggers a pipeline that runs linting, unit tests, and integration tests in parallel. If tests pass, it builds a Docker image and pushes to ECR. The image deploys to a staging ECS cluster. After manual approval in Slack, it promotes to the production ECS cluster with a blue-green deployment. CloudWatch monitors the deployment and auto-rolls back on error rate spikes."
5. Data pipeline (ETL)
An extract-transform-load pipeline from operational databases to an analytics warehouse.
"CDC streams from a PostgreSQL production database flow into Kafka. A Spark job on EMR consumes from Kafka, transforms the data, and writes parquet files to an S3 data lake. dbt runs transformations on the data lake and loads curated tables into Snowflake. Airflow orchestrates the pipeline on a daily schedule. Looker connects to Snowflake for dashboards and reporting."
6. Authentication and authorization system
OAuth 2.0 and RBAC-based auth architecture with single sign-on.
"Users authenticate through an OAuth 2.0 flow with an identity provider (Okta). The IdP issues JWT tokens. The API gateway validates tokens and extracts roles. A policy engine checks permissions against an RBAC rules database. Authorized requests are forwarded to backend services. Refresh tokens are stored in Redis with TTL. An audit log service records all auth events to a separate database."
7. Real-time chat application
WebSocket-based real-time messaging with presence tracking and message persistence.
"Clients connect via WebSocket to a load-balanced cluster of Node.js servers. Messages are published to Redis Pub/Sub for cross-server delivery. Message history is stored in MongoDB. Presence (online/offline) is tracked in Redis with TTL keys. File attachments are uploaded to S3 with presigned URLs. Push notifications for offline users go through Firebase Cloud Messaging."
8. Multi-region cloud deployment
A globally distributed application with low-latency access from anywhere in the world.
"Route 53 uses latency-based routing to direct users to the nearest region: US-East and EU-West. Each region runs an identical stack: ALB, ECS Fargate cluster, and Aurora PostgreSQL. Aurora Global Database handles cross-region replication with the US-East as the primary writer. S3 cross-region replication syncs static assets. CloudFront serves content from both regions with regional failover."
9. Machine learning inference pipeline
Serving ML model predictions at scale with feature stores and model versioning.
"API requests hit an inference gateway that routes to a SageMaker endpoint running the latest model version. The gateway enriches requests with features from a Redis feature store. Predictions are cached in Redis for repeated queries. A/B testing routes 10% of traffic to a challenger model. All predictions are logged to S3 for model monitoring. A Grafana dashboard tracks latency, throughput, and prediction drift."
10. E-commerce platform
A complete e-commerce architecture with search, payments, and inventory management.
"A Next.js storefront connects to a GraphQL API gateway. The gateway aggregates data from five services: Product Catalog (PostgreSQL), Search (Elasticsearch), Cart (Redis), Orders (PostgreSQL), and Payments (Stripe integration). Inventory updates flow through Kafka to keep the catalog and search index in sync. Order events trigger a fulfillment workflow in Step Functions. Email notifications are sent through SES."
How to use these examples
Each prompt above is ready to paste into ArchitectureDiagram.ai. The AI will generate a Mermaid flowchart that you can review and edit, then render it as a polished diagram. You can also export to draw.io, Excalidraw, or generate an AI image.
These prompts are starting points. Use chat-based editing to customize them for your specific system - add monitoring, security layers, or additional services. The best architecture diagrams reflect your actual system, not a generic template.
