Working mobile experience
Core user journeys implemented with loading, empty, error and success states considered—not only ideal-path screens.
Service · Java to Kotlin Migration
Java to Kotlin Migration built for production.
Safe, incremental Java to Kotlin codebase conversion for enterprise Android applications. Eliminate NullPointerExceptions and modernize your mobile architecture.
iOS + AndroidPlatform coverage
React NativeCross-platform
FlutterCross-platform
Launch supportQA & stores
// Safe Kotlin Coroutines + Flow refactor
class ModernizedRepository @Inject constructor(
private val api: EnterpriseApi,
) {
val state: StateFlow<UiState> = api.streamEvents()
.catch { emit(UiState.Error(it)) }
.stateIn(viewModelScope, SharingStarted.Lazily, UiState.Init)
}
class ModernizedRepository @Inject constructor(
private val api: EnterpriseApi,
) {
val state: StateFlow<UiState> = api.streamEvents()
.catch { emit(UiState.Error(it)) }
.stateIn(viewModelScope, SharingStarted.Lazily, UiState.Init)
}
9:41● ●●
Built to ship.
Release readinessProduction
What this service covers
Migration & Refactoring Services
Every engagement is structured around making sure implementation decisions match the actual product requirements.
01
Incremental Codebase Conversion
Module-by-module migration allowing Java and Kotlin to interoperate seamlessly without halting ongoing product feature releases.
02
Coroutines & Flow Asynchronous Architecture
Replace legacy RxJava or AsyncTask boilerplate with lightweight Kotlin Coroutines and StateFlow for responsive, low-latency UI.
03
Jetpack Compose UI Modernization
Transition legacy XML layouts to modern, declarative Jetpack Compose UI systems for faster screen development and cleaner code.
04
Null-Safety & Crash Reduction Audits
Harness Kotlin compile-time null safety to eliminate NullPointerExceptions (NPEs) and achieve 99.9% crash-free user sessions.
05
Automated Regression & Unit Testing
Comprehensive JUnit, MockK, and Espresso test coverage ensuring zero functional regressions throughout the migration lifecycle.
What you get
More than a repository full of code.
The engagement is structured around leaving you with a product that can be operated, learned from and extended after launch.
Maintainable technical base
A codebase organized around future iteration rather than a prototype that becomes expensive the moment usage grows.
Launch-ready handoff
QA, environment setup and release support to move the app from development builds into real users’ hands.
Technology follows the product
No framework dogma. Built around the right tool.
React NativeStrong cross-platform fit for fast iterations
FlutterConsistent UI and expressive rendering
Swift / iOSNative iOS requirements and platform depth
Kotlin / AndroidNative Android performance and hardware features
Common questions
Will migrating our Android app from Java to Kotlin cause downtime or freeze feature development?
No. Java and Kotlin have 100% two-way interoperability. We migrate your codebase incrementally module by module or screen by screen, allowing your team to ship new features without interruption.
What are the main business benefits of migrating from Java to Kotlin?
Kotlin reduces codebase size by 30–40%, virtually eliminates NullPointerExceptions (the #1 source of Android crashes), improves app performance, and significantly speeds up development velocity.
Can you modernize our UI to Jetpack Compose as part of the migration?
Yes. We often pair Java-to-Kotlin migration with declarative Jetpack Compose refactoring to replace cumbersome XML layouts and streamline UI maintenance.
Need senior Java to Kotlin Migration on your product?
Share what exists today, the target platforms and the biggest uncertainty. We’ll help define the most sensible path forward.
Discuss your app ↗