📷 ReceiptSnap Backend

Backend service for ReceiptSnap, an Android app that allows users to securely upload, process, and manage receipts/documents with smart categorization using AWS Services and scalable cloud infrastructure.

This repository contains the Backend of the ReceiptSnap project.
The Android Fronted is developed separately and can be found here:
👉 ReceiptSnap Frontend: https://github.com/pratik50/ReceiptSnap-Frontend-Android

Branch: main — Runs on the AWS EC2 + Docker steup using the Github Runner. The prod branch is of Production Kubernetes deployment on DigitalOcean DOKS. Check the prod branch for setting up with Kubernetes.

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🚀 Features

• 🔐 Authentication with JWT
• 📂 Secure File Uploads (images, videos, PDFs) with Presigned URLs
• ⚡ Async File Processing via SQS + Lambda + Bedrock
• 🗄️ PostgreSQL with Prisma ORM for structured data storage
• 🐳 Containerized Deployment with Docker + EC2
• 🔄 CI/CD Pipeline using GitHub Actions + Docker Hub + EC2 Runner
• 📊 Monitoring & Logging with CloudWatch

🏗️ System Design

Here’s the high-level architecture of ReceiptSnap Backend:

Flow Highlights:

• Android app uploads receipts → API (Express + Node.js) → File Storage (S3).
• Presigned URLs for secure uploads.
• Processing via SQS → Lambda → Bedrock → Results stored back in DB + S3.
• CI/CD pipeline automates build, push, and deployment via Docker.
• CloudWatch monitors logs and health.

🛠️ Tech Stack

• Backend: Node.js + Express
• Database: PostgreSQL (Neon) + Prisma ORM
• Storage: AWS S3 (Raw Uploads, Processed)
• Queue & Processing: AWS SQS, Lambda, Bedrock
• Deployment: Docker, EC2, GitHub Actions CI/CD
• Monitoring: CloudWatch

⚙️ Setup & Installation

1. Clone Repository

  git clone https://github.com/pratik50/ReceiptSnap-Backend.git
  cd ReceiptSnap-Backend

2. Install Dependencies

  npm install

3. Setup Environment Variables

  DATABASE_URL=<postgresql_url>
  JWT_SECRET=<your_secret_key>
  AWS_ACCESS_KEY_ID=<aws_key>
  AWS_SECRET_ACCESS_KEY=<aws_secret>
  S3_BUCKET_NAME=<bucket_name>

4. Run Migrations

  npx prisma migrate dev

5. Start Development Server

  npm run dev

🔄 CI/CD Pipeline

-	Code pushed to main → GitHub Actions triggers build.
-	Docker image built & pushed to Docker Hub.
-	EC2 Runner pulls latest image and deploys container.
-	Health checks ensure service uptime.

📊 Monitoring & Logging

-	CloudWatch collects logs, metrics, and alerts.
-	Processing & API logs stored for debugging.

🔗 Related Repositories

• Frontend (Android App): ReceiptSnap-Frontend-Android
• Backend (this repo): ReceiptSnap-Backend

🤝 Contributing

1.	Fork the repo
2.	Create a feature branch (git checkout -b feature-name)
3.	Commit changes (git commit -m "Added new feature")
4.	Push branch (git push origin feature-name)
5.	Open a Pull Request 🚀  

🆓 End Note

This project is open-source and free to use.
You are welcome to modify, distribute, and learn from it.

Made with ❤️ by Pratik Jadhav