Event Ticket System Development with Stripe

I'm looking for a skilled programmer to help build a comprehensive event ticketing system available on both web and mobile platforms.

Essential features include:
- Ticket sales for registered members
- Merch and token sales
- Cloakroom check-in functionality
- Door QR code scanning check-in

Payment functionalities needed:
- Stripe integration
- Multiple payment gateways
- Refund processing

Ideal candidates should have experience with payment processing systems, mobile and web development, and event management platforms.
We are a small non profit organisation, that need system due to regulations.
System needs to be secure and fast