Cross-Platform Social App Development

I'm looking for an experienced app developer to create a cross-platform social networking app for iOS and Android. The app should facilitate communication through video calls, SMS, WhatsApp, and regular calls.

Key Requirements:
- Develop for both iOS and Android
- Core feature: Communication (video calls, SMS, WhatsApp, calls)
- User-friendly interface
- Secure and reliable performance

Ideal Skills:
- Proven experience in developing social networking apps
- Expertise in both iOS and Android platforms
- Strong UI/UX design skills
- Knowledge of secure communication protocols

Please provide examples of previous work and a timeline for project completion.