LangEdge Backend

A backend service for the AI-powered language learning and translation platform.

Overview

LangEdge Backend provides the API services and server-side logic that powers the LangEdge language learning and translation platform. It handles user authentication, translation requests, data persistence, and communication with external AI services.

Features

• RESTful API: Well-structured endpoints for frontend communication
• AI Integration: Connects to language model services for translation and NLP features
• Authentication: Secure user authentication and authorization
• Database Operations: Efficient data storage and retrieval
• Error Handling: Robust error management and logging
• Containerization: Docker support for easy deployment

Links

• Live Website: langedge.kritapas.dev
• Frontend Repository: LangEdge-Frontend

Tech Stack

• Runtime: Node.js
• Framework: NestJS with TypeScript
• Authentication: Firebase
• Database: PostgreSQL, TypeORM
• Testing: Jest
• Containerization: Docker

Installation

1. Clone the repository
2. Install dependencies:

npm install

3. Set up environment variables

OPENAI_API_KEY="sk-..."
DATABASE_CONNECTION_STRING="postgresql://..."
FIREBASE_API_KEY="..."
FIREBASE_SERVICE_ACCOUNT={...}

4. Start the development server:

npm run start:dev

Building for Production

Build the Docker image:

OPENAI_API_KEY="sk-..." sh ./build.sh

Run the Docker container:

sh ./run.sh ${PORT}

Copyright

© 2025 Kritapas Suwannawin. All rights reserved.