Hotel Management System

🎯

Project Overview

I developed a complete Hotel Management System consisting of three integrated applications that work seamlessly together to provide a modern booking experience for hotel guests.

📱

iOS App

Swift 5.0 & SwiftUI
Clean Architecture + MVVM
Zero dependencies • 3,681 lines

🤖

Android App

Kotlin • Jetpack Compose
MVI + Clean Architecture • Hilt DI
Multi-language (EN/ES) • Testing

🔧

Backend API

Java & Spring Boot
PostgreSQL • JWT Auth
13+ REST endpoints

✨

Features

🔐

Authentication & Security

Full registration and login system with JWT token management, secure Keychain storage, automatic token refresh, and field-specific validation.

🏨

Room Management

Search available rooms by date range and guest count, browse with AsyncImage loading, view detailed room information including pricing and capacity.

📅

Reservation System

Create bookings with confirmation screens, view upcoming and past reservations, manage bookings with swipe-to-delete, and detailed price breakdowns.

👤

User Profiles

View guest information, manage account details, and secure logout functionality with complete data privacy.

🚀

Development Highlights

📱

Unified Multi-Platform Ecosystem

The system integrates iOS (SwiftUI), Android (Jetpack Compose), and a Spring Boot REST API. Each client communicates securely via shared JWT auth.

🧱

Consistent Clean Architecture

Both mobile clients implement Clean Architecture patterns (MVVM for iOS, MVI for Android) with clear Presentation → Domain → Data layers.

🔐

End-to-End Security

JWT tokens flow securely between apps and API, using Keychain on iOS and Encrypted SharedPreferences on Android.

📡

Reliable Networking

Custom networking on iOS (URLSession + Codable) and Retrofit on Android ensure consistent data flow with RESTful endpoints.

🧩

Developer Experience

Protocol-oriented design, dependency injection (Hilt, manual DI), and reusable components make onboarding easy.

⚙️

Scalability Ready

The backend supports horizontal scaling with a stateless JWT model, while mobile clients are designed for versioned API compatibility.

🤖

Android App — Key Details

Highlights from the Android client, built with modern Kotlin and Jetpack Compose.

🧭 Architecture

MVI with Clean Architecture and clear layers: Presentation (Compose + ViewModels), Domain (Use Cases), and Data (Repositories).

🧰 Core Stack

Kotlin, Jetpack Compose, Hilt for DI, Retrofit for networking, Room for persistence, and Firebase for auth and notifications.

🧪 Testing

Unit and instrumented tests with Mockito. Gradle tasks for CI: ./gradlew test and connectedAndroidTest.

📦 Project Status

Development: Completed
Deployment: Done
Platform: Android 14+
Repository: HotelClient

🍎

iOS App — Key Details

Highlights from the iOS client built with SwiftUI and modern Swift concurrency.

🏗️ Architecture

Clean Architecture + MVVM with strict separation: Presentation (SwiftUI Views & ViewModels), Domain, and Data layers.

🧰 Core Stack

Swift 5, SwiftUI, Async/Await, Combine, manual DI, AsyncImage for images, iOS 17.4+ target.

🔐 Security

JWT stored in Keychain, automatic token injection and refresh on 401, centralized auth state.

📦 Project Status

Development: Completed
Deployment: Pending
Platform: iOS 17.4+
Repository: HotelClientIos

🧠

API — Key Details

The backend service powering both iOS and Android clients, built with Spring Boot and designed for reliability, scalability, and security.

🏗️ Architecture

Clean layered design — Controller → Service → Repository → Model — ensuring maintainable, modular code.

🔐 Security

Secure endpoints protected by Spring Security with JWT authorization. Tokens issued and validated for each mobile request.

🗄️ Data Management

Data persistence via PostgreSQL and Hibernate ensures consistency and scalability with mapped entities.

📦 Project Status

Development: Completed
Deployment: Done
Framework: Spring Boot 3.x
Repository: HotelManagmentApi

🛠️

Tech Skills Demonstrated

Mobile Development (Common)

Clean Architecture MVVM MVI RESTful API JWT Auth Localization (EN/ES) Unit Tests

iOS Skills

Swift 5.0 SwiftUI Async/Await Combine Manual DI Keychain URLSession Zero Dependencies

Android Skills

Kotlin Jetpack Compose Hilt (DI) Retrofit Room Firebase Auth Mockito

Backend Development

Java Spring Boot Spring Security Hibernate PostgreSQL Maven JWT

🔗

Live Project

View the complete source code on GitHub:

📞 Interested in This Project?

I'm available for freelance work, consulting, or full-time opportunities.
Let's discuss how this project can be adapted for your needs.

📧 Email Me 💼 View GitHub

💼

Services Available

📦

Full Purchase

Own the complete source code with all intellectual property rights and unlimited modifications.

🔧

Custom Development

Adapt the system for your specific needs with custom features and branding.

🤝

Consultation

Architecture guidance, code review, and technical mentorship for your team.