Cross-Platform Magic Trick App Development

I'm looking for an experienced mobile app developer to create a cross-platform (iOS and Android) magic trick app. The app will require an activation code system, with login through email and password. A valid license code will be necessary to use the app.

The main component of this app is a website that mimics a standard known site Users will navigate to a specific shortlink URL (url.xyz/ID#) that's linked to their account. This site should enable users to search for specific information.

Key Features:
- Certain Information from the website should be sent to the app and displayed in various ways, such as:
- Push notifications
- In-app notifications
- The website will contain interactive elements (forms, links) (I can be more specific on the website in private messages)
- Support for multiple languages within the app
-Have an API

Ideal candidates should have:
- Proficiency in mobile app development for both iOS and Android
- Experience with creating interactive web elements
- Skills in setting up push and in-app notifications
- Understanding of activation code systems and user authentication via email and password.