📇 Contact Book

A production-ready contact management application built with Next.js and AWS Serverless services.

The application provides secure authentication with Amazon Cognito, image uploads using Amazon S3 pre-signed URLs, and an event-driven backend for asynchronous image cleanup. It demonstrates modern cloud-native architecture using AWS Lambda, API Gateway, EventBridge, and SQS.

🔗 Live Demo: https://contactbook.chrisalex.online

🏗️ Architecture

✨ Features

• Secure user authentication with Amazon Cognito

• JWT protected REST APIs

• Create, update, delete and view contacts

• Upload up to five contact images

• Direct browser uploads using Amazon S3 pre-signed URLs

• Event-driven image deletion using EventBridge and SQS

• Responsive UI for desktop and mobile devices

• Password reset with email verification

• Client-side form validation with live password requirements

• Automatic HTTPS deployment using AWS Amplify

• 🛠 Tech Stack

Frontend

• Next.js 15
• React
• TypeScript
• Tailwind CSS
• AWS Amplify

Backend

• Node.js

• TypeScript

• AWS Lambda

• API Gateway

• Amazon Cognito

• Amazon S3

• Amazon EventBridge

• Amazon SQS

• MongoDB Atlas

• Serverless Framework

• 🚀 Highlights

This project focuses on backend architecture rather than only CRUD functionality.

Key implementation highlights include:

• Direct browser uploads using Amazon S3 pre-signed URLs
• Event-driven asynchronous image deletion
• Stateless serverless APIs deployed on AWS Lambda
• Secure JWT authentication using Amazon Cognito
• Responsive frontend built with Next.js App Router
• Production-ready deployment with AWS Amplify