Android Employee Communication App

I’m rolling out an internal-only Android application whose single purpose is to make it effortless for every employee to talk to any other employee. Messaging, voice calls, and video conferencing all have to live in one clean interface, running smoothly on current Android versions. Once a user signs in with corporate credentials, all conversations are open—there are no department or role restrictions—so the directory must load the full company roster by default. Realtime text chat should feel as immediate as today’s consumer apps: status presence, push notifications, read receipts, and the ability to share images or small files. For voice and video I’m leaning toward WebRTC, but I’m open to equivalent low-latency libraries that keep call setup snappy even on average mobile networks. Lightweight encryption for messages and calls is expected; bring your preferred implementation, just detail how keys are handled. The UI needs to follow Material Design, dark and light themes included, and the codebase should be Kotlin-first with clear separation of concerns (MVVM, Clean Architecture, or your proven alternative). Continuous integration via GitHub Actions or GitLab CI is a plus so testers can install a fresh APK after every merge. Deliverables • Production-ready APK and signed app bundle • Full, well-commented source in a private Git repo • One-page deployment guide for our internal Play Console track • Short user guide (PDF) covering chat, voice, and video features The moment all three communication modes are stable and passed on-device QA, we’ll consider the project complete and move to maintenance discussions.