Booking & Marketplace

Design a Hotel Booking System (Handling overlapping constraints)

A booking platform preventing double-booking of room-date inventory under high concurrency, with date-range overlap checks at its core.

Core Architectural Components

Tracks which rooms are open on which dates across every property.

The core correctness primitive preventing two bookings from claiming overlapping dates.

Hold-then-confirm flow so a room isn't double-sold mid-checkout.

Answers "what's open, where, for these dates" quickly across huge inventory.

Applies dynamic nightly rates, taxes, and fees.

Authorizes and captures payment tied to a confirmed reservation.

Manages the full reservation lifecycle including refund policy enforcement.