WordPress Booking Plugin Extension Developer

Advanced WordPress / WooCommerce Developer – Booking System

We are looking for an experienced PHP / WordPress / WooCommerce developer to extend an existing custom booking plugin.

The existing system is operational. This is an extension of an existing codebase, not a rebuild.

Required expertise
Advanced PHP & WordPress plugin development
WooCommerce development and payment workflows
Payment authorization / delayed capture
MySQL transactions and race-condition-safe processing
Booking/reservation and capacity systems
Secure token-based invitation/acceptance workflows
WordPress Cron and automated workflows
Testing, debugging and regression prevention
Experience extending existing custom plugins

The project includes complex session processing, automated teacher assignment, payment handling and replacement-session logic.

Important
Development exclusively on staging
No production access
Existing functionality must be preserved
No unnecessary third-party dependencies
Thorough testing is required
Fixed Price: USD 180

Strictly non-negotiable. The complete agreed scope must be delivered for USD 180.

Please answer briefly:
Years of professional PHP/WordPress experience?
One relevant booking/reservation project?
Experience with payment authorization and delayed capture?
How would you prevent two simultaneous bookings from exceeding capacity?
How would you prevent two teachers from being assigned simultaneously?
Confirm: USD 180 fixed and non-negotiable? (Yes/No)
Confirm: staging-only development with no production access? (Yes/No)

Generic applications without relevant experience will not be considered.

The detailed technical specification will be provided to shortlisted candidates. The existing plugin architecture must be understood and extended rather than unnecessarily rebuilt.