Cross-Platform Mobile Stock Trading App -- 2

I'm seeking a seasoned mobile app developer to create a comprehensive stock trading application that operates on both iOS and Android platforms.

Key Features:
- Real-time Stock Market Monitoring: The app should provide live updates of stock prices and market trends.
- Options Chain Visualization: Users should be able to view the options chain smoothly.
- Option Strategy Constructor: An integrated tool for users to build their own trading strategies based on options.

Technical Aspects:
- The backend will utilize socket.io to emit data, so familiarity with this technology is essential.
- User authentication will be required through email/password, so experience with secure login systems is a plus.

Ideal candidates should have a strong background in:
- Cross-platform mobile app development
- Real-time data handling
- Secure user authentication implementation
- Creating interactive user interfaces

Please include examples of previous similar projects in your proposal.