A high-integrity booking engine for service providers, featuring real-time availability and atomic transaction handling. 📅

Service providers often struggle with manual scheduling, leading to double bookings and inefficient time management. Building a digital solution is challenging because it requires a system that can precisely calculate available slots while considering weekly rules, time-off blocks, and preventing two users from booking the same millisecond of time.

I engineered a comprehensive scheduling marketplace where businesses can create "Workspaces" and define their own Availability Rules. The core engine calculates dynamic slots in 30-minute increments by filtering out confirmed bookings and provider time-off. To ensure 100% reliability, I implemented a transaction-safe booking flow using Django's select_for_update, which locks the database row during the creation process to prevent double bookings. 🛠️

The result is a robust Marketplace where clients can discover services by city or name and book appointments with instant confirmation. Providers gain a professional dashboard to manage their services, set time-off, and monitor their schedule. This project demonstrates an advanced understanding of database integrity, complex time-math, and modular software architecture. 🚀