Cross-Platform Customer Info Update App

I'm looking for an experienced mobile app developer to create an app for both iOS and Android platforms. The app will allow customers to update their information, receive notifications about their products, and provide links to update the web portal when necessary. We work in Tax and Wealth management so security is important.

Key Features:
- User Authentication: Email and password
- Notifications:
- Push notifications
- In-app notifications

Ideal Skills and Experience:
- Proficiency in developing cross-platform mobile apps
- Experience with secure email/password authentication
- Knowledge in implementing push and in-app notification systems
- UI/UX design skills for a user-friendly experience

Please include your portfolio and relevant experience in your bids. Looking forward to your proposals!