// app development
Kotlin & Jetpack Compose Development
Need a native Android feature implemented, an existing screen improved or a codebase brought forward without starting again?
DroidRooter offers Kotlin and Jetpack Compose development for Android applications. The work can be a focused change inside your current project or part of a new native build, with the existing architecture and release process taken into account.
Native Android work with a clear boundary
A new account flow, a tablet layout or a difficult screen-state bug should not automatically become a proposal to rewrite the entire application.
We start by identifying what the feature owns, where its data comes from and which existing behaviour must remain unchanged. That gives the work a testable boundary and makes review more meaningful.
For a complete product build rather than a framework-specific engagement, see custom Android app development.
Where Kotlin and Compose fit
Jetpack Compose is Android's recommended modern UI toolkit, built around Kotlin APIs. It is useful for new native interfaces and can coexist with View-based screens in an existing application.
The presence of Compose does not, by itself, make an app well structured. UI state, asynchronous work, error handling and navigation still need deliberate design. We treat the toolkit as part of the solution, not a substitute for understanding the application.
Development work we can scope
New features and screens
Implement defined user journeys, connect screens to existing data sources and include the states users encounter before, during and after an operation. A submitted form should distinguish between validation errors, a request in progress and a failed response.
Compose adoption in existing applications
Identify suitable screens or components for migration, retain working functionality and plan the boundary between Compose and existing Views. An incremental change is often easier to verify than a full interface replacement.
Java-to-Kotlin migration
Review which modules benefit from migration and which can remain stable. Conversion should preserve behaviour and improve maintainability where there is a reason to change it; translating syntax alone is not the objective.
Performance and lifecycle issues
Investigate slow screens, excessive work, state loss or behaviour that changes after the app is backgrounded. Reproduce the problem on a defined build and device before deciding what to optimise.
Adaptive layouts and accessibility
Scope layouts for the device sizes that matter to your users, including larger text, keyboard interaction and assistive technology where applicable. A layout that merely stretches is not necessarily a useful tablet experience.
What an implementation handover should contain
The agreed change should arrive with enough context for another developer to understand it: what was changed, why it was changed, how to build it and what was tested.
Depending on the scope, deliverables can include source changes, focused automated tests, a test build, migration notes and a list of known limitations. Work inside a client repository should follow its established conventions unless a specific change has been agreed.
Private signing material and production credentials should not be placed in the source tree or shared through an initial enquiry form.
How we avoid unnecessary rewrites
We separate the application's actual problem from the age of its tools. A stable Java module may be less urgent than a new Kotlin screen with unreliable state management. A build upgrade may be necessary without requiring a UI migration.
The review should answer three practical questions: what blocks the required change, what can remain as it is and what tests will show that existing users have not lost functionality?
When the immediate problem is a crash or broken build rather than a planned feature, start with Android app debugging.
Kotlin, Flutter and the existing codebase
Kotlin is a natural candidate for Android-focused work. Flutter development is a separate option when sharing application code across Android and iOS is an important requirement.
A Flutter project can also need Kotlin for a platform integration. We can evaluate that boundary without assuming that the entire application should move to native Android.
Frequently asked questions
Can you work with XML layouts instead of Compose?
Yes. The current application and the requested change determine the approach. A Compose migration is not a prerequisite for maintenance or feature development.
Can just part of an app move to Compose?
Yes. Compose and View-based interfaces can coexist. The migration needs a defined boundary and checks for navigation, state and the components shared between them.
Do you use the newest library version automatically?
No. Version choices should reflect compatibility, stability, security needs and the existing build. “Newest” is not enough reason to introduce an unrelated migration.
Can you improve an unfinished Kotlin app?
Yes, subject to a code review and appropriate access. We first establish whether it builds, what already works and what is needed to reach a defined milestone.
Can this include a Kotlin integration for Flutter?
Yes. Describe the Android API or vendor SDK involved. The shared Flutter layer and native Android implementation can then be scoped together.
Bring a feature, a migration or a difficult screen
Share the outcome you need and a short description of the current app. Repository access can follow after the scope and access arrangements are clear.