Multi-Service App Development and Backtesting

I'm seeking a skilled developer to create a comprehensive multi-service app for both iOS and Android platforms. The app should integrate the following services:

1. Travel & Tourism: Similar to Wego or MakeMyTrip.
2. Customized Document Services: Labor, immigration, attestation, notary, legal translation.
3. Rent a Car: Similar to Subscribe Me.
4. Propriety Rental, Buying & Selling: Similar to Propriety Finder.
5. Customized Education Services.
6. Customized Immigration Services.
7. Utility Payment: India & UAE.
8. Job Searching: Similar to Indeed.
9. Insurance: Connect via API.
10. Customized Haj & Umrah Services: From UAE, UK, India.

User Authentication:
- Email and password
- Social media login
- Phone number verification

Ideal Skills and Experience:
- Expertise in mobile app development for both iOS and Android.
- Experience in integrating multiple services and APIs.
- Strong background in user authentication and secure login systems.
- Familiarity with travel, real estate, and job search platforms.
- Proven track record of backtesting applications.

Please provide portfolios and relevant experience. Looking forward to your bids!