Employee Management System - A Microservices Architecture
The Employee Management System is a comprehensive, enterprise-grade application demonstrating a complete transition from a monolithic architecture to a distributed microservices system. As a cornerstone project in my portfolio, it showcases advanced backend development techniques and a deep understanding of modern cloud-native patterns. This project serves as a practical guide to service decomposition, inter-service communication, centralized configuration, and robust security in a distributed environment. Key Architectural Features Service Decomposition: The system is broken down into independent, domain-driven microservices, each with its own database and logic. Employee Service: Manages core employee data and handles user authentication. Payroll Service: Processes detailed salary and payroll information. Leave Service: Manages employee leave requests and approvals. Service Discovery: Utilizes Netflix Eureka as a service registry, allowing services to dynamically find and communicate with each other without hardcoded endpoints. Centralized Entry Point: A Spring Cloud Gateway acts as the single entry point for all client requests. It is responsible for routing, load balancing, and cross-cutting concerns like security. Decentralized Security: Security is enforced at the gateway level using Spring Security and JSON Web Tokens (JWT). The gateway validates tokens before forwarding requests to downstream services, ensuring the entire system is secure. Core Technologies Backend: Java 21, Spring Boot 3 Microservices: Spring Cloud Gateway, Netflix Eureka Security: Spring Security 6, JWT (JSON Web Tokens) Database: Spring Data MongoDB (for data persistence) Build: Apache Maven For a detailed explanation of the architecture, API endpoints, and setup instructions, please visit the Employee-System GitHub Repository.