Full-Stack Developer for Car Rental App

I'm looking for an experienced full-stack app developer to create a car rental reservation management system that works on web, iOS, and Android platforms.

Key functionalities include:
- Car search and booking
- User account management

Essential third-party integrations:
- Payment gateways, will have our existing system and will procide API access
- Maps and navigation
- Integrate with our existing reservation sofware. JSON data will be provided from API

Ideal skills and experience:
- Proficiency in web and mobile app development
- Experience with payment gateways and map integrations
- Strong background in CRM/ERP system integration
- Familiarity with user account management features

Please provide examples of similar projects you've completed. Looking forward to your proposals!