Bike Shop Service Appointment Booking System

I'm looking for a skilled developer to create a comprehensive booking system for my bike shop. This system will be primarily for scheduling service appointments.

Key Features I Need:
- A user-friendly frontend for customers to book service appointments (mobile friendly)
- Iframe or similar for a Shopify website
- A robust backend to manage these bookings
- Collection of specific information from customers during the booking process. This includes:
- Their contact details
- Bike details
- Customer library and bike library (several bikes per customer)
- Id number for shocks and fork
- Different prices based on manufacturer and model (should be a dropdown)
- Payment option (if possible)
- Syncing to Shopify library (if possible)
- The system should be built considering my current system, which is velodrop.com

Ideal Skills:
- Proficiency in both frontend and backend development
- Previous experience in creating booking systems
- Familiarity with bike parts and service pricing would be a plus
- Understanding of Shopify and its integration
- Ability to create a dropdown menu for different pricing based on manufacturer and model
- Experience with payment gateway integration

Please note, I don't need this system to integrate with any existing systems at this moment, but it should be built with future integrations in mind.