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RiskShield Backend\n\nA production-ready FinTech backend platform built with Spring Boot, designed for secure credit, risk, and user management systems.\n\n\n![Java](https://img.shields.io/badge/Java-17-orange?style=flat-square\u0026logo=openjdk)\n![Spring Boot](https://img.shields.io/badge/Spring%20Boot-3.2.5-green?style=flat-square\u0026logo=spring)\n![PostgreSQL](https://img.shields.io/badge/PostgreSQL-16-blue?style=flat-square\u0026logo=postgresql)\n![Redis](https://img.shields.io/badge/Redis-Caching-red?style=flat-square\u0026logo=redis)\n![Docker](https://img.shields.io/badge/Docker-Enabled-blue?style=flat-square\u0026logo=docker)\n![JWT](https://img.shields.io/badge/Auth-JWT-red?style=flat-square)\n![Swagger](https://img.shields.io/badge/Docs-Swagger%20UI-brightgreen?style=flat-square\u0026logo=swagger)\n\n\n\n\n\n\n🚀 Overview\n\nRiskShield is a modular backend system that simulates a real-world financial platform, including:\n\nSecure authentication \u0026 authorization\nOTP-based verification\nCredit scoring engine\nFraud detection system\nRedis-based rate limiting \u0026 idempotency\nAudit logging with AOP\nNotification system with retry\nDocument management\nAdmin control panel\nAnalytics dashboard\n🏗 Architecture\nAPI Gateway Layer\n  ├── Rate Limiter (Redis)\n  ├── Idempotency (Redis)\n  ├── JWT Security\n\nController Layer\n  ├── Auth / OTP\n  ├── Credit / Fraud\n  ├── Admin / Analytics\n\nService Layer\n  ├── Business Logic\n  ├── Scoring Engine\n  ├── Fraud Engine\n\nData Layer\n  ├── PostgreSQL (JPA)\n  ├── Redis (cache + idempotency)\n🔥 Key Features\n✔ JWT Authentication \u0026 Role-based Authorization\n✔ OTP Verification (hashed storage)\n✔ Credit Scoring Engine\n✔ Fraud Detection System\n✔ Redis-based Rate Limiting\n✔ Redis-based Idempotency\n✔ Audit Logging (AOP)\n✔ Notification System with Retry\n✔ File Upload \u0026 Document Management\n✔ Admin Panel APIs\n✔ Analytics Dashboard\n✔ Correlation ID for tracing\n✔ Feature Toggle system\n📦 API Modules\nModule\tDescription\nAuth\tRegistration, login, JWT, refresh tokens\nOTP\tEmail verification with expiration\nCredit\tRisk scoring \u0026 eligibility\nFraud\tTransaction analysis \u0026 blacklist\nNotification\tEmail + retry mechanism\nAudit\tAOP-based activity tracking\nDocuments\tFile upload/download\nAdmin\tUser \u0026 role management\nAnalytics\tDashboard metrics\nRate Limit\tRedis-based protection\n🛠 Tech Stack\nTechnology\tUsage\nJava 17\tCore language\nSpring Boot 3.2\tBackend framework\nSpring Security\tAuth \u0026 access control\nJWT\tStateless authentication\nPostgreSQL\tMain database\nRedis\tCaching, rate limiting, idempotency\nDocker\tContainerization\nSpring AOP\tAudit logging\nSpring Mail\tEmail service\nActuator\tMonitoring\nSwagger\tAPI documentation\n🐳 Run with Docker\ndocker-compose up --build\n⚙️ Environment Variables\nDB_URL=jdbc:postgresql://localhost:5432/riskshield\nDB_USERNAME=postgres\nDB_PASSWORD=your_password\n\nJWT_SECRET=your_secret_key\n\nMAIL_HOST=smtp.gmail.com\nMAIL_USERNAME=your@email.com\nMAIL_PASSWORD=your_app_password\n📖 API Docs\n\nSwagger UI:\n\nhttp://localhost:8080/swagger-ui.html\n🔒 Security\nJWT-based authentication\nRole-based access control (RBAC)\nRedis-backed rate limiting\nRedis-backed idempotency\nHashed OTP \u0026 refresh tokens\nAudit logging with correlation ID\n📁 Project Structure\ncom.seabuhi.riskshield\n ├── common\n ├── config\n ├── module\n ├── security\n💡 Why This Project?\n\nThis project demonstrates:\n\n✔ Real-world backend architecture\n✔ Security best practices\n✔ Distributed system thinking (Redis)\n✔ Clean code \u0026 modular design\n✔ Production-ready mindset\n📄 License\n\nMIT License\n\n👨‍💻 Author\n\nSeabuhi 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