Cross-Platform Mobile App for Security Restrictions

I am looking for an experienced mobile app developer who can create a security-focused mobile application for both Android and iOS platforms. This app needs to implement several critical restrictions to ensure the device's safety and integrity.

Key Requirements:
- APK Installation Restrictions: The app should prevent the installation of any unauthorized APK files.
- Restricted Links: The app needs to identify and restrict access to certain predefined links.
- Unauthorized Links: Any links deemed unauthorized should be blocked outright, with no access permitted.

The ideal freelancer for this project should have:
- Proven experience in mobile app development for both Android and iOS.
- Prior work with implementing security features within mobile applications.
- A solid understanding of APK file structures and link tracking.

Please note: The app should block access to unauthorized links completely, with no exceptions. This is a critical requirement for the project.

In your bid, please include examples of similar projects you've worked on, particularly if they involved security-focused mobile app development.