Smartphone Repair Appointment Plugin for WordPress

I'm seeking a talented developer to create a WordPress plugin that facilitates appointment making for users needing smartphone or tablet repairs. The plugin needs to be similiar but more extended like this already existing plugin: [login to view URL] I'd like to have the end user to be able to input data with the same kind of looks and functionality with ajax as the example plugin stated above.

Key features:

- A frontend form for end users to schedule repairs.

- A backend interface for administrators to manage appointments.

- Appointment details should include: device type and issue, preferred appointment time and date, and contact information of the user. People should be able to choose a repair, be it simple or advanced, by choosing a repair from the a list once they selected their brand and device.

- An integrated SMS and email system to notify users about their appointments, also with cron options to inform customers after a succesfull repair appointment but also 1 or 2 hours before the repair is planned as a reminder.

- The amount of brands and models should be updateable by new plugin updates to keep adding new devices.

- Prices of each and every repair that is listed should be changable in the backend for users to be able to selected their own prices and margins per repair.

- Plugin needs to be able to take feed and/or api data from multiple wholesale suppliers to suggest prices per repair.

- Backend should be able to select wich brands, wich models and wich repairs to show and wich not to show.

- All data needs to be stored into mysql, so that we can use all data, prices, models, brands, appointment and customer data and so on, for our next project, wich is a standalone multi user repair managing platform that would make store owners be able to take in repairs, both from carry in repairs or those that are booked via the plugin. So if this plugin is up and running, we will offer you the next job to create this program. We have extensive guidelines what to implement in this as we already have a similiar software running coded in c# winforms. The idea is to host this on a ssd server that would have 1 subdomain+ database per store.

The ideal freelancer for this project should have:

- Extensive experience in WordPress plugin development.

- A strong understanding of creating user-friendly forms and backend interfaces.

- Skills in integrating SMS and email notification systems.

- A portfolio showcasing similar projects in the past.