Amit Kumar

Owned end-to-end delivery of StarsTell User and Astrologer mobile applications using Kotlin and Flutter, from architecture and UI development through release and post-launch iteration. Built real-time voice calling with ZegoCloud, offline-resilient chat with local caching and presence tracking, Firebase notifications with deep linking, and wallet and recharge flows using Razorpay and PayPal. Used Firebase Analytics, Crashlytics, Sentry, Remote Config, Mixpanel, and CleverTap to monitor quality and improve engagement. Restructured the codebase using Clean Architecture and the Repository pattern. Also contributed to telecom client applications delivered through World Phone IT Services, including Android and iOS eKYC and telecom selfcare apps deployed across five countries.

Delivered business applications with Flutter and native Android technologies across different device sizes and screen densities. Built offline-first applications with local database migrations, search, image editing, and secure storage for sensitive records. Implemented in-app purchase flows, authentication, background processing, PDF and Excel report generation, and automated Play Store release pipelines. Wrote unit and widget/UI tests and mentored more than three junior developers through code reviews and sprint planning.

Built native Android and Flutter applications using Kotlin, Jetpack Compose, MVVM, dependency injection, and Kotlin Coroutines. Designed ViewModel-driven state layers backed by LiveData and StateFlow for predictable UI updates. Prototyped real-time voice and background notification flows with Agora and Pusher, including Android background processing and permissions. Integrated Stripe and PayPal payments and Spotify OAuth with secure authentication and careful API key handling.