Comprehensive Finance Productivity App Development

I'm seeking an experienced app developer to create a comprehensive finance productivity app. The app should integrate multiple functionalities to manage all aspects of finances, including:

- Budget tracking
- Expense management
- Investment tracking

Ideal Skills & Experience:
- Proven app development experience, particularly in finance-related applications
- Strong understanding of UX/UI design principles
- Familiarity with security protocols to protect sensitive financial data
- Ability to integrate multiple financial services and tools

Please share your portfolio and relevant experience.