Car Auction Platform for Dealerships

I'm looking for a well curated and robust (possibly pre-made) Auction Website and App tailored specifically for car dealerships. This platform will allow dealerships to auction their vehicles digitally, increasing their reach, transparency, and operational efficiency.

Key Requirements:
- Both iOS and Android support
- User roles: Dealership admin, Sales representatives, Bidder within dealership
- Essential inventory management features:
- Add new vehicles
- Update vehicle details
- Remove sold vehicles

Ideal Skills and Experience:
- Proven experience in developing auction platforms
- Strong understanding of inventory management systems
- Expertise in mobile app development for both iOS and Android
- UI/UX design skills for a streamlined and user-friendly interface
- Knowledge of backend technologies to support multiple user roles and secure transactions

If you have the skills and experience to deliver this project, I would love to hear from you.