Contact person: Multiplatform VoIP & Chat App

Phone:Show

Email:Show

Location: Chino Hills, United States

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I’m ready to build a fully featured calling application that lands simultaneously on iOS, Android and Windows. The core experience must combine crystal-clear voice calling, smooth video sessions and a snappy text messenger inside one intuitive interface.

I’ll reveal the proprietary call-routing logic and a few standout features once we have an NDA in place, but at a high level you will be responsible for designing the clients, wiring them to a secure real-time comms stack (WebRTC, SIP or a solution you can justify), and preparing each build for its respective store. A shared code-base—React Native, Flutter, MAUI, or another framework—is welcome so long as the end result feels native and performs flawlessly.

Key deliverables
• Production-ready apps for iOS, Android and Windows
• Real-time voice, HD video and in-app messaging with end-to-end encryption
• Backend services for signaling, presence, contact sync and push notifications
• Store-ready packages, signed certificates and a clear build/deploy guide

I’ll provide wireframes, brand assets and server credentials once we agree on an approach. Show me examples of VoIP or chat apps you have shipped, outline the toolchain you prefer (Agora, Twilio, Firebase, custom SIP, etc.), and let me know how you plan to guarantee call quality across all networks. If you can deliver stable voice, video and messaging on all three platforms, let’s talk details and milestones right away." (client-provided description)