Social Messaging App with Calls

I’m building “Baat karna,” a social-networking app that focuses first and foremost on real-time conversation.

The core deliverable I need from you is an instant-messaging module that supports one-to-one text chat plus integrated voice and video calls. Think WhatsApp-style call quality and speed, but without the extra bells and whistles for now. Media sharing and group chats might come later, yet they are outside the current scope—keeping the build lightweight and fast is my priority.

Key expectations
• Stable, low-latency text messaging
• Seamless voice and video calling with clear audio and reliable connectivity
• Clean, intuitive UI for chat and call flow (login, contact list, chat screen, call screen)
• Secure user authentication and encrypted data in transit
• Admin-friendly codebase with clear documentation for future feature additions

You can choose the tech stack (React Native, Flutter, native iOS/Android, etc.) as long as it delivers cross-platform performance and is maintainable. Please outline your preferred approach, any third-party services you’d integrate (e.g., WebRTC, Firebase, Twilio), and milestone timing.

When you respond, share examples of messaging or VoIP work you’ve shipped, note the frameworks you’re most comfortable with, and give a brief roadmap of how you’ll get us to a functional MVP.