Cross-Platform News App Development

I'm looking for an experienced developer to create a comprehensive news app for both iOS and Android platforms.

Key Requirements:
- Push notifications for breaking news
- User comments and discussions on articles
- Well-organized categories and subcategories for news content
- All content to be manually added by an admin

Ideal Skills and Experience:
- Proven experience in mobile app development for both iOS and Android
- Strong knowledge of implementing push notifications
- Experience with building interactive user comment sections
- Ability to create a user-friendly, organized content layout

Please provide examples of similar work done.