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Expense tracker with cloud backend

Why Choose This Project?

Managing personal and business expenses is a critical life skill. An expense tracker with a cloud backend allows users to store, analyze, and manage their financial data securely from any device.
This project helps students learn full-stack cloud development, serverless integration, database design, and secure financial data handling.

What You Get

Secure cloud-hosted expense tracker
User authentication and profile management
Add, edit, delete, and categorize expenses
Automatic reporting with charts and summaries
Cloud database storage for scalability
Access from web or mobile apps
Optional multi-user collaboration (family, team)
Export data to CSV/PDF

Key Features

Feature	Description
User Authentication	Secure login/signup with OAuth or email-password
Expense Recording	Add income/expense with amount, category, and date
Categorization	Tag expenses under Food, Travel, Rent, Bills, etc.
Cloud Database	Store all transactions securely in the cloud
Reports & Analytics	Charts, monthly summaries, and spending insights
Multi-device Access	Sync across web, mobile, and desktop
Data Export	Export expenses to CSV or PDF
Notifications	Reminders for bills or unusual spending
Security	Data encryption with cloud IAM roles and TLS

Technology Stack

Layer	Tools/Technologies
Frontend	React / Angular / Flutter (for mobile)
Backend API	Node.js / Spring Boot with REST APIs
Cloud Database	AWS DynamoDB / Firebase Firestore / Azure Cosmos DB
Authentication	AWS Cognito / Firebase Auth / OAuth 2.0
Storage (Exports)	AWS S3 / Google Cloud Storage
Analytics	Chart.js / D3.js / Google Data Studio
Notifications	Firebase Cloud Messaging / AWS SNS
Deployment	AWS Amplify / Google Firebase Hosting / Azure App Service

Cloud Services Used

Service	Purpose
AWS DynamoDB / Firestore	Cloud-native NoSQL database for expense storage
AWS Cognito / Firebase Auth	Authentication and user management
AWS S3 / GCS	Store CSV/PDF export files securely
AWS Lambda / Cloud Functions	Serverless backend for expense processing
AWS SNS / FCM	Notifications and reminders
AWS Amplify / Firebase	Hosting frontend and managing CI/CD
CloudWatch / Firebase Logs	Monitoring user activity and performance

Working Flow

User Authentication
- User registers/logs in via Cognito/Firebase Auth.
- Session tokens ensure secure access.
Add/Manage Expenses
- User inputs expense details (amount, category, date, note).
- Backend API validates and stores them in DynamoDB/Firestore.
Data Storage & Sync
- Expenses are securely stored in the cloud.
- Data is synced across devices in real-time.
Reports & Analytics
- The system aggregates monthly/weekly expenses.
- Visual charts are generated for insights.
Notifications
- Reminders for upcoming bills.
- Alerts for overspending in a category.
Export Data
- Users can export reports as CSV/PDF stored in S3/Cloud Storage.
Monitoring & Security
- CloudWatch/Logs track API usage.
- IAM roles ensure access control.