Bookmi

Full-Stack Spot & Service Booking Marketplace (Airbnb-Inspired)

ReactNode.jsExpressMongoDBReact NativeStripeSocket.IOCalendar Sync

The Problem Solved

Event organizers and venue managers suffered frequent double-booking conflicts, fragmented availability calendars across Google/Outlook, and opaque host-to-guest messaging.

Architectural Scope & Implementation

Developed a full-stack booking marketplace supporting Customers, Hosts, Service Providers, and Administrators. Engineered bidirectional Google and Outlook calendar synchronization, real-time booking negotiation chat, temporary availability slot locking, and Stripe escrow transaction management.

Key Technical Challenge

Preventing race conditions during simultaneous booking attempts for high-demand venue time slots through pessimistic database locking strategies in MongoDB.

Outcome & Engineering Result

Produced a fluid booking engine with verified zero double-booking occurrences and seamless calendar synchronization across time zones.

System Capabilities & Architecture Highlights

Atomic slot-reservation engine preventing concurrent double-bookings

Bidirectional synchronization with Google Calendar and Outlook APIs

Role-based authorization covering Customers, Hosts, Providers, and Admins

Integrated real-time negotiation and direct messaging channel

Engineered by Zain Ali (HeyZain)

This system is part of Zain Ali's production portfolio. Zain is a full-stack developer specializing in Next.js, React, Node.js, TypeScript, and MongoDB, engineering full-stack platforms from schema design to edge deployment.

Read About Zain Ali's Background -> Explore Technical Writing & Research ->

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