Immediate Joiners only

Monday to Saturday working

Chennai based or Tamilnadu based Candidates are preffered

Key skills:

SIP/VoIP, WebRTC, React Native, Kotlin, SwiftMVVM/MVI, call, audio/video, push notificationAndroid and iOS, WebSocket

About the role

We are looking for a Senior Software Engineer (Mobile) 7+ years to own the design, development and release of our communication apps on Android, with cross-platform work in React Native. You will work across real-time voice and video calling (SIP/VoIP, WebRTC), contact-centre features, and AI.

Key responsibilities

- Design and build Android apps in Kotlin/ Swift and Jetpack Compose using MVVM/MVI, Clean Architecture and multi-module Gradle.
- Build and maintain real-time calling features: SIP signalling, WebRTC audio/video, incoming-call push, foreground call services and Telecom integration.
- Deliver call handling, chat, presence and call history.
- Integrate on-device machine learning models (ONNX) through the native layer for offline inference.
- Develop and maintain cross-platform features in React Native for Android and iOS.
- Own app performance and stability: startup time, ANRs, memory leaks, crash rate, using Android Profiler, Perfetto, Baseline Profiles and LeakCanary.
- Make architecture decisions, review code,



and set coding standards for the mobile team.
- Work with backend, QA and product teams on API design, planning and releases.
- Manage Play Store releases, policy compliance, and production monitoring.

Required skills and experience

- Strong Kotlin: coroutines, Flow, and a explicit understanding of how they work internally.
- Experience in Swift, UIkit, Swift UI for IOS .
- Jetpack Compose, ViewModel, Navigation, Room, DataStore, WorkManager, Hilt.
- Architecture: MVVM, MVI, Clean Architecture, unidirectional data flow, multi-module projects.
- Real-time communication: SIP/VoIP, WebRTC, WebSocket, push-based incoming calls.
- React Native development for Android and iOS, including native modules.
- Networking and security: Retrofit, OkHttp, TLS/HTTPS, certificate pinning, Android Keystore.
- Android SDK internals: lifecycles, services, permissions, background execution limits.
- Performance tooling: Android Profiler, Perfetto, Macrobenchmark, Baseline Profiles, LeakCanary, ANR analysis.
- Testing: unit tests with coroutines and Flow, Compose UI tests.
- Experience shipping and maintaining apps on Google Play.
- Contact-centre or UCaaS product experience.
- CI/CD for mobile (GitHub Actions or similar), screenshot testing.

📌 Mobile Application Developer (Chennai)
🏢 Worktual Innovations
📍 Chennai