Build serverless applications with AWS Lambda.
Run code without managing servers.
Getting Started
// handler.js
exports.handler = async (event) => {
const { name } = JSON.parse(event.body);
return {
statusCode: 200,
body: JSON.stringify({ message: `Hello ${name}!` })
};
};
Trigger Types
✅ API Gateway (HTTP)
✅ S3 (file uploads)
✅ DynamoDB (stream)
✅ CloudWatch (scheduled)
✅ SNS (messages)
Pricing
First 1M requests/month: FREE
After: $0.20 per 1M requests
Compute: $0.0000166667 per GB-second
Best Practices
✅ Keep functions small
✅ Use layers for dependencies
✅ Implement cold start optimization
Conclusion
Lambda simplifies serverless development!