Android and iOS Development for Opinion Trading App

I'm looking for a skilled developer to help me design and implement an Android and iOS app for opinion trading. This app is focused on stocks and is aimed at providing a basic level of user interaction.

Key Features and Functionalities:
- The app should be capable of user authentication for access control.
- It should support push notifications to keep users engaged.
- In-app purchases functionality is essential for future monetization.

Financial Instruments:
- The app will exclusively focus on stocks. Please ensure the design and functionality of the app align with this.

User Interaction:
- The desired level of user interaction for this app is basic. This means users should be able to view available stocks and make trades.

Ideal Candidate:
- Proficiency in Android and iOS development, with a strong portfolio of similar apps.
- Experience implementing user authentication, push notifications, and in-app purchases.
- Prior work with financial apps, particularly those focusing on stocks, is highly desirable.
- Understanding of basic user interaction and trading functionalities.
- Good communication skills and a proactive approach to problem-solving.