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Expense Splitter Backend

A production-ready backend API for splitting group expenses, inspired by Splitwise.
Supports authentication, group management, expense tracking, and balance calculation.

Live Demo

Backend URL:
https://expensespliter.onrender.com

Swagger API Docs:
https://expensespliter.onrender.com/api-docs

Full-stack live URL: https://expense-frontend-peach-three.vercel.app

Features

  • User authentication using JWT
  • Create and manage groups
  • Add shared expenses within groups
  • Automatic equal expense splitting
  • Group-wise balance calculation
  • Secure protected routes with middleware
  • Interactive API documentation using Swagger

Tech Stack

  • Node.js
  • Express.js
  • PostgreSQL
  • Sequelize ORM
  • JWT (JSON Web Tokens)
  • Swagger (OpenAPI)
  • Deployed on Render

Authentication Flow

  1. User registers or logs in
  2. Server issues a JWT
  3. Client sends JWT in request headers
  4. Protected routes are validated via middleware

Setup Locally

git clone https://github.com/Eswarpulaparthi/expenseSpliter
cd expenseSpliter
npm install
npm start