Secure Mobile Chat App Development - 07/08/2025 08:01 EDT

I need a secure mobile chat application for both iOS and Android platforms. The app should support text messaging, voice calls, and video calls.

Key Requirements:
- Tor network integration for anonymity
- Implementation of Signal Protocol for encryption
- End-to-end encryption for all communications
- Robust mobile app cryptography

Ideal Skills and Experience:
- Experience with Tor network development
- Proficiency in Signal Protocol and encryption methods
- Background in mobile app development, specifically for iOS and Android
- Strong knowledge in cryptography and secure communications

Please provide a portfolio demonstrating similar work.