Airbnb Booking System

A microservices-based Airbnb clone built with Node.js, TypeScript, and Docker for scalable hospitality platform management.

ExpressJs, TypeScript, NodeJs, MySQL, Redis, Zod, Golang | Aug 2025 – Sep 2025

Booking Notifications

Service	Architecture	Focus
Microservices	2 Core Services	Booking & Notifications

Overview

A production-ready, microservices-based Airbnb clone featuring hotel management through booking operations and notification services. Built with modern technologies for scalable deployment.

Key Highlights

ACID Transactions: Enforced multi-step transactions for zero data inconsistencies via automatic rollbacks.
Concurrency Management: Implemented Redis Redlock and pessimistic locking to eliminate race conditions.
Idempotency: Built idempotent APIs to prevent duplicate payments.
High Throughput: Integrated a Golang API gateway to proxy requests with low-latency routing.

Interactive System Flow

System Architecture

graph TD
    subgraph "Client Layer"
        C[Client Application]
    end

    subgraph "API Gateway"
        GW[Gateway/Load Balancer]
    end

    subgraph "Microservices"
        BS[Booking Service<br/>Port: 3002]
        NS[Notification Service<br/>Port: 3003]
    end

    subgraph "Databases & Queue"
        DB[(MySQL Database)]
        Redis[(Redis Queue & Cache)]
        BQ[Bull Queue]
    end

    C --> GW
    GW --> BS
    GW --> NS

    BS --> DB
    BS --> BQ
    NS --> Redis
    NS --> BQ

Service Communication Flow

sequenceDiagram
    participant U as User
    participant BS as Booking Service
    participant NS as Notification Service
    participant Q as Bull Queue

    U->>BS: Search/Create Hotels
    BS->>U: Return Hotel Data

    U->>BS: Create Booking
    BS->>BS: Validate & Store Booking
    BS->>Q: Queue Notification Job
    BS->>U: Return Booking Confirmation

    Q->>NS: Process Email Job
    NS->>NS: Send Confirmation Email
    NS->>Q: Mark Job Complete

Services

Booking Service (Port 3002)

Purpose: Hotel management, booking operations and reservation management
Database: PostgreSQL with Prisma ORM (MySQL compatible schema design)
Features:
Hotel CRUD operations
Hotel search and filtering capabilities
Reservation creation and management
Booking status tracking
Cancellation handling
Room availability management

Notification Service (Port 3003)

Purpose: Email notifications and messaging
Database: Redis for queue management
Features:
Asynchronous email processing
Bull Queue for job management
Template-based notifications
Delivery status tracking

Tech Stack

Backend Core

Runtime          │ Node.js 18+ with Express.js
Language         │ TypeScript for type safety
Package Manager  │ npm for efficient dependency management

Databases & Storage

Hotels & Bookings │ PostgreSQL / MySQL with Prisma ORM
Queue & Cache     │ Redis with Bull Queue