Cross-Platform Event Management App Development

I am looking for a skilled app developer to create an event management app for my startup. This app will be available on both iOS and Android and will serve as a platform for hosting and managing parties. Key Features: - Event Booking System: Customers should be able to easily book tickets for various events. - User Verification: A robust system for verifying users, primarily through ID document uploads. The ideal candidate for this project should have experience in developing cross-platform apps and a strong understanding of event management systems. Please provide examples of similar projects you've worked on in your proposal. The app should include an in-app chat feature for event organizers and attendees to communicate easily. Please integrate the payment system: UPI.