Mobile & Ionic Portal Mobile App Development

I'm in need of a competent Mobile developer with expert knowledge in Ionic Portal technology. The main concept is for an application to be designed using this technology, which will allow other developers to write additional small functional programs.

Key Functionality Requirements:
- User authentication
- Database integration
- Push notifications

The mobile application should be compatible with the following platforms:
- iOS
- Android

In terms of design aesthetics, I prefer a clean and minimalistic design.

Successful bids are expected from developers with proven experience in Ionic Portal technology, mobile app development across iOS and Android platforms, with a keen eye for clean and minimalist design. Your familiarity with user authentication, database integration, and push notification systems will be highly regarded.