Serverless changes how we design applications. Here are patterns that work well in serverless environments.
Function Composition
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Event-Driven Architecture
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Step Functions Orchestration
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Fan-Out Pattern
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CQRS with DynamoDB Streams
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Saga Pattern
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Cost Optimization
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Best Practices
Design:
✓ Single responsibility per function
✓ Use events for async communication
✓ Implement idempotency
✓ Design for failure and retries
Performance:
✓ Minimize cold starts
✓ Keep functions small
✓ Use connection pooling
✓ Cache when possible
Cost:
✓ Right-size memory allocation
✓ Use ARM architecture
✓ Batch process where possible
✓ Set reserved concurrency limits
Observability:
✓ Structured logging
✓ Distributed tracing
✓ Custom metrics
✓ Alert on errors
Conclusion
Serverless architecture requires different patterns than traditional applications. Embrace event-driven design, use orchestration for complex workflows, and always consider idempotency. Good serverless design leads to scalable, cost-effective applications.