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Become a Senior Software Engineer - https://tinyurl.com/86e7casf This video is a deep dive into designing a highly scalable hotel reservation system, focusing on solving critical senior-level engineering challenges like concurrency, data consistency and preventing double bookings. 🔖 Sections 00:00 - Introduction 01:17 - The 4-Step Design Framework 02:04 - Step 1: Clarifying Questions & Functional Requirements 03:39 - Dynamic Pricing & Demand Factors 04:44 - Core Search & Discovery Functionalities 06:13 - Non-Functional Requirements: Consistency & Latency 07:27 - Data Estimation: QPS and TPS 08:43 - Real-world Traffic Funnel Analysis (Booking.com Scale) 13:03 - Step 2: High-Level System Architecture 15:50 - Scaling Search with Elasticsearch 18:41 - Monolith vs. Microservices 20:11 - API Design & Restful Endpoints 25:35 - Preventing Double Bookings 30:37 - Deep Dive into Search Service Logic 31:44 - Database Design & Schema Architecture 35:22 - Managing Room Inventory & Availability 38:50 - Logic for Checking Availability & Overbooking 40:57 - Why SQL? 42:15 - Handling Concurrency & Race Conditions 43:50 - Final Summary & Scaling Challenges