Next.js Fullstack architecture Template

A production-ready Next.js template featuring modern architecture patterns, complete authentication system, and scalable project structure. Built with TypeScript, Domain-Driven Design principles, and enterprise-level best practices.

🚀 Features

• ✅ Complete Authentication System (JWT-based with HTTP-only cookies)
• ✅ Domain-Driven Design Architecture with clean separation of concerns
• ✅ Type-Safe API with Zod validation and TypeScript
• ✅ Modern State Management using Redux Toolkit + RTK Query
• ✅ Protected Routes with Next.js middleware
• ✅ Form Handling with React Hook Form and validation
• ✅ Error Handling with custom error classes
• ✅ MongoDB Integration with Mongoose
• ✅ Responsive UI with Tailwind CSS
• ✅ Developer Experience optimized with ESLint, Prettier, and Turbopack

🏗️ Project Structure

src/
├── app/(client)/           # App Router client pages (Route Groups)
│   ├── auth/              # Authentication pages (login, register)
│   ├── dashboard/         # Protected dashboard page
│   └── layout.tsx         # Root layout with providers
├── app/api/               # API Routes
│   ├── auth/              # Authentication endpoints
│   └── users/             # User management endpoints
├── components/            # Shared UI components
├── domain/                # Domain layer (DDD pattern)
│   └── user/              # User domain with entities, repos, services
├── features/              # Feature modules
│   └── auth/              # Authentication feature module
├── shared/                # Shared utilities and infrastructure
│   ├── auth/              # Authentication utilities
│   ├── container/         # Dependency injection container
│   ├── database/          # Database connection
│   └── errors/            # Custom error classes
└── store/                 # Redux store configuration

🛠️ Tech Stack

Core Technologies

• Next.js 15.4.5 - React framework with App Router & Turbopack
• React 19.1.0 - UI library
• TypeScript 5.x - Type safety
• Tailwind CSS 4.1.11 - Styling

State Management

• Redux Toolkit 2.8.2 - State management
• RTK Query - API state and caching
• React Redux 9.2.0 - React integration

Authentication & Security

• JWT (jose, jsonwebtoken) - Token-based authentication
• bcryptjs - Password hashing
• Zod 4.0.14 - Schema validation

Database & Backend

• MongoDB - Database
• Mongoose 8.17.0 - ODM with custom repository pattern

Form Handling

• React Hook Form 7.61.1 - Form management
• @hookform/resolvers - Schema integration

Developer Experience

• ESLint + Prettier - Code quality and formatting
• TypeScript - Static type checking
• Path aliases (@/*) - Clean imports

🚀 Getting Started

Prerequisites

• Node.js 18+
• MongoDB database
• npm or yarn

Installation

1. Clone the repository

   git clone <repository-url>
   cd next-job-board

2. Install dependencies

   npm install

3. Environment Setup Create a .env.local file:

   MONGODB_URI=your_mongodb_connection_string
   JWT_ACCESS_SECRET=your_jwt_access_secret
   JWT_REFRESH_SECRET=your_jwt_refresh_secret

4. Run the development server

   npm run dev

5. Open your browser Navigate to http://localhost:3000

Internationalization

• Multiple Language Support: English and Farsi
• Localized Routing: Language-specific routes
• Automatic Language Detection

🏛️ Architecture Patterns

Domain-Driven Design (DDD)

• Domain Layer: Business logic and entities
• Repository Pattern: Data access abstraction
• Service Layer: Business operations
• Dependency Injection: Loose coupling with custom DI container

Security Best Practices

• JWT with HTTP-only cookies for secure token storage
• Password hashing with bcrypt
• Request validation with Zod schemas
• Custom error handling preventing information leakage
• Route protection with Next.js middleware

Performance Optimizations

• Turbopack for faster development builds
• RTK Query for automatic caching and background refetching
• Route Groups for organized routing
• Middleware for efficient auth checks

📱 Use Cases

This template is perfect for:

• ✅ Job Boards & Career Platforms
• ✅ SaaS Dashboards with user authentication
• ✅ E-commerce Platforms (user management foundation)
• ✅ Content Management Systems
• ✅ Multi-tenant Applications
• ✅ Any CRUD-heavy web application

🔐 Authentication Flow

1. Registration/Login - Secure user authentication
2. JWT Token Generation - Access and refresh tokens
3. HTTP-only Cookies - Secure token storage
4. Middleware Protection - Route-level authentication
5. Automatic Token Refresh - Seamless user experience

📝 API Routes

• POST /api/auth/register - User registration
• POST /api/auth/login - User login
• POST /api/auth/logout - User logout
• POST /api/auth/refresh - Token refresh
• GET /api/users/currentuser - Get current user

🎨 UI Components

• Responsive design with Tailwind CSS
• Form components with validation
• Toast notifications for user feedback
• Loading states and error handling
• Clean and modern interface

🧪 Development Commands

# Development server with Turbopack
npm run dev

# Production build
npm run build

# Start production server
npm start

# Lint code
npm run lint

🌟 Key Features Explained

Feature-Based Architecture

Each feature (auth, jobs, etc.) is self-contained with its own:

• Components
• Services
• Types
• Schemas
• Hooks

Type Safety

• End-to-end TypeScript coverage
• Zod schema validation
• Type-safe API responses
• IntelliSense support

Error Handling

• Custom error classes for different scenarios
• Consistent API error responses
• User-friendly error messages
• Proper HTTP status codes

State Management

• Server state with RTK Query
• Client state with Redux Toolkit
• Authentication context
• Optimistic updates

🤝 Contributing

This template follows clean architecture principles. When adding new features:

1. Follow the feature-based folder structure
2. Implement proper domain separation
3. Add appropriate error handling
4. Include type definitions
5. Write validation schemas

📄 License

This project is open source and available under the MIT License.

---

Built with ❤️ using Next.js, TypeScript, and modern web development practices.