A scalable, production-ready backend system built with Java 21, Spring Boot, and Spring Security. It integrates robust API security with monetization logic (Free, Basic, Premium plans), JWT authentication, PostgreSQL storage, and traffic protection via Bucket4j rate limiting. Load balancing is handled using NGINX for smooth and reliable performance. This can be used as source for developemnt of secure APIs. Needs inclusion of API of desired Payment service like Stripe, Paypal etc.
- 🔐 JWT-based Authentication & Authorization
- 📊 API Rate Limiting with Bucket4j
- 📦 PostgreSQL-backed persistent storage
- 🌐 Load balancing with NGINX for scalability
- 💳 User Monetization Classes:
Free,Basic,Premium - 🔐 Role-based and Plan-based API access control
| Layer | Technology |
|---|---|
| Language | Java 21 |
| Framework | Spring Boot, Spring Security |
| Database | PostgreSQL |
| API Security | JWT (JSON Web Tokens) |
| Rate Limiting | Bucket4j |
| Load Balancer | NGINX |
| Build Tool | Maven |
| Containerization | Docker (optional) |
- Authentication Module: Secure login and signup with encrypted credentials.
- Authorization Layer: Access controlled via Spring Security and user roles.
- User Plan Management: Users are categorized into:
Free: Limited access, strict rate limit.Basic: Moderate access, relaxed rate limit.Premium: Full access with premium API quota.
- Rate Limiting: Implemented using Bucket4j to avoid abuse per user plan.
- Request Logging & Auditing: (Optional, based on implementation)
- NGINX Load Balancing: Ensures service availability under high traffic.
- Manage Payment History: Manages payment history of customers.
Use tree -L 2 to generate:
API_Security/
├── src/
│ ├── main/
│ │ ├── java/com/security/api/
│ │ │ ├── auth/
│ │ │ ├── config/
│ │ │ ├── controller/
│ │ │ ├── dto/
│ │ │ ├── model/
│ │ │ ├── repository/
│ │ │ ├── security/
│ │ │ ├── service/
│ │ │ └── util/
│ └── resources/
│ ├── application.yml
│ └── static/
├── nginx/
│ └── default.conf
├── Dockerfile
├── pom.xml
└── README.md