Smart Linguo API

AI-powered translation infrastructure built for developers and global products.

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Overview

SmartLinguo API is a scalable translation platform powered by OpenAI, designed for applications that need fast, secure, and production-ready multilingual capabilities.

The platform provides:

• AI translations via OpenAI
• Token-based consumption model
• Stripe-powered payments
• Secure authentication with Keycloak
• API key generation and quota management
• Translation history tracking
• Cloud-ready infrastructure

This repository contains the core backend API built with Quarkus and Java 21.

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Tech Stack

Layer	Technology
Backend	Quarkus 3
Language	Java 21
Database	PostgreSQL
Authentication	Keycloak
Payments	Stripe
AI Provider	OpenAI
Containerization	Docker
Cloud	AWS
Observability	CloudWatch

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Features

AI Translation API

Translate content using OpenAI models through a unified SmartLinguo API.

Secure API Keys

Generate and manage API keys linked to authenticated accounts.

Token Quota System

Consumption-based architecture using prepaid translation credits.

Stripe Integration

Automatic quota recharge after successful checkout sessions.

Keycloak Authentication

Enterprise-grade identity and access management.

Translation History

Track requests and monitor API usage over time.

Production-Ready Infrastructure

Dockerized environment with AWS deployment support.

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Architecture

Client Application
        │
        ▼
SmartLinguo API (Quarkus)
        │
 ┌──────┼──────┐
 ▼      ▼      ▼
OpenAI Stripe Keycloak
        │
        ▼
 PostgreSQL