Open to opportunities

Jatin Kumar

@devjatinkumar

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Android developer with 2+ years building secure offline-first apps in Kotlin.

India

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What I'm looking for

I’m looking for an Android role where I can build secure, offline-first apps with clean architecture and measurable performance. I want to own features end-to-end, integrate sensors, and implement robust cryptographic security for real users.

I’m a results-driven Android Developer with 2+ years of experience shipping production-grade mobile applications, including a live app on the Google Play Store. I specialize in Kotlin, Jetpack, MVVM, and Clean Architecture, with a strong focus on offline-first system design and performance-optimized implementations.

I bridge OS-level internals with clean application-layer design—using WorkManager and Coroutines for background task orchestration and delivering latency-sensitive async pipelines. I also deliver high-trust mobile security through Android Keystore, AES-256-GCM, PBKDF2, TEE-backed designs, and secure session lifecycle handling, while integrating hardware sensors like GPS and accelerometer for real-time experiences.

Experience

Work history, roles, and key accomplishments

Android Developer Intern

DSRSecureTech

Jun 2024 - Sep 2024 (3 months)

Developed secure, offline-first Android applications using Kotlin, MVVM, Room, and Firebase, including a Notes app with encrypted local storage and authentication. Improved UI responsiveness using RecyclerView and optimized lifecycle handling.

Kotlin MVVM ROOM Firebase Authentication Firebase Realtime Database Offline First RecyclerView

Android Developer Intern

Bharat Intern

Oct 2023 - Nov 2023 (1 month)

Built Android applications in Kotlin using the Android SDK with a focus on UI/UX and performance. Reduced app load time by 20% through resource and lifecycle optimization.

Kotlin Android SDK UI UX Performance Optimization Lifecycle