Role

Full-Stack Developer & System Architect

Objective

Designed and developed a comprehensive enterprise-grade attendance management system with frontend-backend separation architecture. The system provides complete solutions for employee clock-in/out, leave requests, business trips, overtime applications, approval workflows, and statistical reporting. This project demonstrates proficiency in full-stack development, system architecture design, RESTful API development, database design, authentication & authorization, and production deployment.

System Architecture

The system adopts a modern three-tier architecture with clear separation of concerns:

• Frontend Layer: Vue 3 with Composition API, TypeScript for type safety, Element Plus for UI components, Pinia for state management
• Backend Layer: Fastify framework for high-performance RESTful API, TypeScript for type safety, layered architecture (routes → controllers → services → repositories)
• Data Layer: MySQL 8.x database with Prisma ORM for type-safe database access and migrations

Key Features & Technical Highlights

1. Authentication & Authorization System

• Implemented JWT-based authentication with secure token management
• Role-Based Access Control (RBAC) with four roles: Employee, Manager, HR, Admin
• Middleware-based route protection ensuring secure API endpoints
• Password encryption using bcrypt with salt rounds

2. RESTful API Design & Implementation

• Designed comprehensive RESTful API endpoints following REST principles
• Request validation using Zod schema validation library
• Structured error handling with consistent error response format
• API documentation with Postman collection for testing

3. Database Design & Data Modeling

• Designed normalized database schema with Prisma Schema Language
• Implemented complex relationships: one-to-many, many-to-many with proper foreign keys
• Organization-level data isolation using org_id for multi-tenant support
• Database migrations and seed data management

4. Frontend Development

• Component-based architecture with reusable Vue 3 components
• Type-safe development with TypeScript throughout the frontend
• State management with Pinia stores for user authentication and application state
• Responsive UI design with Element Plus component library
• Axios interceptors for request/response handling and error management

5. Business Logic Implementation

• Clock-in/out module with GPS location verification
• Multi-type request system: leave, business trip, punch correction, overtime
• Approval workflow with duration modification and comments
• Statistical reporting with work hours calculation and attendance analytics
• User management with CRUD operations and role assignment

Technologies

Frontend

Vue 3, TypeScript, Vite, Element Plus, Vue Router, Pinia, Axios

Backend

Node.js ≥ 20, Fastify, TypeScript, Prisma ORM, MySQL 8.x, Zod, JWT, bcrypt

DevOps & Deployment

Vercel (Frontend), Render (Backend), Aiven MySQL, GitHub Actions, Environment Configuration

My Contributions

• Architected the entire system with frontend-backend separation and layered backend design
• Designed and implemented RESTful API endpoints with proper HTTP methods and status codes
• Developed database schema with Prisma, including relationships, indexes, and constraints
• Implemented authentication middleware and JWT token management system
• Built role-based access control system with permission checks at API and UI levels
• Developed frontend components with Vue 3 Composition API and TypeScript
• Implemented complex business logic including approval workflows and statistical calculations
• Configured and deployed application to production environments (Vercel, Render)
• Wrote comprehensive documentation including API documentation, deployment guides, and user guides

Results

• Successfully deployed production-ready system serving real enterprise users
• Achieved type safety across the entire stack with TypeScript and Prisma
• Implemented scalable architecture supporting multiple organizations and roles
• Delivered comprehensive feature set covering all attendance management requirements
• Demonstrated proficiency in modern software engineering practices and tools

GitHub Repository

View GitHub Repository