Three-Tier Web Application

Overview

Built a fully serverless three-tier web application using AWS services, demonstrating end-to-end cloud architecture design, deployment, and security best practices.

Architecture Layers

• Presentation Tier (Frontend): Static website hosted on Amazon S3
• Application Tier (API): REST API created with AWS API Gateway and AWS Lambda
• Data Tier (Database): Serverless database using Amazon DynamoDB

AWS Services Used

• Amazon S3
• Amazon API Gateway
• AWS Lambda
• Amazon DynamoDB
• AWS IAM
• AWS CloudWatch (for monitoring and logging)

Key Features

• Fully serverless deployment with no traditional servers
• RESTful API architecture with Lambda integration
• Schema-less DynamoDB design with partition keys
• Secure IAM policies for Lambda and API Gateway access control
• API documentation using OpenAPI/Swagger
• Production deployment with live API endpoints

Skills Demonstrated

• AWS Serverless Architecture
• Three-Tier Web Application Design
• API Gateway + Lambda Integration
• DynamoDB Data Modeling
• IAM Security Best Practices
• API Documentation
• Monitoring with CloudWatch

Time to Complete

Approximately 3 hours

Challenges Overcome

• Coordinating API Gateway, Lambda, and DynamoDB integration
• Debugging IAM permission issues for least-privilege access
• Writing OpenAPI documentation for deployed API endpoints