Learn AWS-LAMBDA with Real Code Examples

REST API backend with API Gateway + Lambda

Processing uploaded files in S3

Scheduled batch jobs via CloudWatch Events

Data transformation in DynamoDB Streams

Triggering notifications via SNS or EventBridge

Check CloudWatch logs for errors

Verify IAM role permissions

Confirm triggers are correctly configured

Test locally using AWS SAM or Serverless Framework

Monitor concurrency and throttling issues

Use AWS SAM CLI for local testing

Unit test functions independently

Simulate event payloads (S3, API Gateway, DynamoDB)

Check logs via CloudWatch

Use CI/CD pipelines for automated testing

AWS Console manual deployment

AWS CLI via `aws lambda deploy`

Serverless Framework for automated deployments

AWS SAM CLI for packaged deployments

CI/CD pipelines with CodePipeline or GitHub Actions

AWS CLI

AWS SAM CLI

Serverless Framework

CloudWatch Logs & Metrics

AWS SDKs for multiple languages

API Gateway for HTTP requests

S3 for storage events

DynamoDB Streams for database triggers

SNS and EventBridge for messaging/events

Step Functions for orchestration

Keep functions small and single-responsibility

Use Layers for code reuse

Use CI/CD pipelines for deployment

Monitor cold-starts and optimize memory

Leverage AWS managed services to reduce boilerplate

Cold-start latency

Managing multiple triggers and functions

Optimizing resource allocation

Debugging in serverless environment

Ensuring secure IAM policies and secrets management