Cloud-Native Messaging Application on AWS
Event-driven serverless chat platform with scalable architecture and secure authentication.
Overview
Built a cloud-native chat application using React and TypeScript with AWS Amplify and AppSync for real-time messaging. Designed a serverless backend with AWS Lambda, ECS, and Step Functions for event-driven message handling. Integrated Cognito for authentication, DynamoDB and RDS for persistent storage, and CloudWatch for monitoring and alerting.
System Architecture
Serverless Event-Driven Architecture: Frontend (React/TypeScript) connects to API Gateway and AppSync for GraphQL subscriptions. Backend consists of Lambda microservices (Auth, Chat, Notifications) orchestrated by Step Functions. SNS/SQS handle async message processing. DynamoDB stores chat history and user profiles; RDS handles transactional data. Cognito provides OAuth/JWT authentication. CloudFront CDN accelerates static assets. CloudWatch/X-Ray enable distributed tracing and monitoring across all services.
Setup & Implementation
Frontend developed with React and AWS Amplify for real-time chat updates. Backend implemented using a combination of ECS containers and AWS Lambda functions connected via Step Functions for asynchronous workflows. AppSync managed GraphQL API requests, Cognito handled secure authentication, and SQS ensured reliable message delivery. Route53 and ELB provided traffic routing and load balancing across distributed services.