Evergreen - Mobile Carpool Organization App

A sustainability-focused mobile carpool application.

Features

• Request and offer rides
• Real-time notifications for new requests/offers
• Edit ride offers
• Invite friends to join

Tech Stack

• Language: TypeScript
• Frontend: Expo Go (React Native)
• Backend: Node.js + Express
• Database: MongoDB Atlas
• Monorepo: npm workspaces

Project Structure

SFHacks-2026/
├── apps/
│   ├── mobile/              # Expo Go mobile app
│   └── backend/             # Express API server
├── packages/
│   └── shared-types/        # Shared TypeScript types
├── package.json
├── README.md
└── AGENTS.md

Prerequisites

• Node.js (v18+)
• npm
• MongoDB Atlas account (for production)
• Expo Go app (for mobile development)

Quick Start

1. Install Dependencies

npm install

2. Environment Setup

Create .env files for each app:

apps/backend/.env:

PORT=3000
MONGODB_URI=your_mongodb_atlas_uri
CORS_ORIGIN=*

apps/mobile/.env:

API_URL=http://localhost:3000

3. Start Development

# Start backend
npm run backend

# In a new terminal, start mobile
npm run mobile

Available Scripts

• npm run mobile - Start Expo development server
• npm run backend - Start backend development server
• npm run build - Build all packages
• npm run test - Run all tests
• npm run lint - Lint all packages

Team

• Andre Dargani
• Michael McGruder
• Brayden Concepcion
• Gavin Funk

Built for SF Hacks 2026