📄 Automated Bill Processing System (AWS)

🚀 Overview

The Automated Bill Processing System is a fully serverless, event-driven solution built on AWS. It automates the process of extracting information from uploaded bill images, storing the structured data, and sending confirmation emails — all without the need for a traditional backend or frontend application.

This project demonstrates cloud-native design principles, serverless automation, and scalable data processing using AWS managed services.

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📸 Architecture Diagram

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⚙️ Technologies & AWS Services

• Amazon S3 → Stores raw bill images
• AWS Lambda → Event-driven serverless compute
• Amazon Textract → OCR for extracting text from bills
• Amazon DynamoDB → NoSQL database for structured bill data
• Amazon SES → Sends automated email notifications
• Amazon CloudWatch → Logs, metrics, and monitoring
• AWS CloudTrail → API activity auditing

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✨ Key Features

• 📤 Automated Upload & Trigger → Bills processed as soon as uploaded
• 🧠 OCR Integration → Extracts key fields (amount, date, vendor, etc.)
• 📂 Serverless Storage → DynamoDB for structured data
• 📧 Email Notifications → SES sends confirmation emails automatically
• 📊 Monitoring & Logs → CloudWatch for debugging and alarms
• 🔒 Scalable & Secure → Built entirely on AWS managed services

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🔄 Workflow

sequenceDiagram
    participant User
    participant S3
    participant Lambda
    participant Textract
    participant DynamoDB
    participant SES

    User->>S3: Upload Bill Image
    S3-->>Lambda: Trigger Event
    Lambda->>Textract: Extract Text (OCR)
    Textract-->>Lambda: Return Extracted Data
    Lambda->>DynamoDB: Store Processed Bill Data
    Lambda->>SES: Send Email Notification
    Lambda->>CloudWatch: Log Execution & Metrics

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📌 Project Status

• ✅ Implemented as a 2-tier serverless architecture (Application + Data).
• 🚧 Planned upgrade into a 3-tier system with a frontend dashboard and API Gateway.

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🔮 Future Enhancements

• Add a React-based dashboard for uploading and viewing bills
• Expose APIs via Amazon API Gateway for external integrations
• Integrate Amazon Comprehend to validate and categorize bill data
• Add a Cost Analysis Module to track and summarize spending trends
• Enable SNS notifications (SMS/push alerts)

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📂 Repository Structure

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├── /lambda_functions    # AWS Lambda function code
├── /docs                # Architecture diagrams & documentation
├── README.md            # Project documentation
└── /sample_bills        # Example bill images for testing

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🛠️ Setup & Deployment

1. Create an S3 Bucket for bill uploads.
2. Configure Lambda Function to trigger on S3 uploads.
3. Integrate Textract within the Lambda to extract text.
4. Save output to DynamoDB.
5. Verify emails in SES and set as recipients.
6. Enable CloudWatch for logging and monitoring.

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📊 Monitoring & Security

• CloudWatch → Logs Lambda executions and sets up alarms for errors.
• CloudTrail (optional) → Tracks API activity for auditing and compliance.

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🎥 Demo

*Bill uploaded to S3*

*Textract output stored in DynamoDB*

*Processed bill details sent via SES*

🧑‍💻 Author

Vellure Lohith — B.Tech CSE Student | Aspiring SDE (Java) | Cloud & AWS Enthusiast