Oskar Karpiński

Native Android applications designed for continued development

I design and implement Android applications with Kotlin and Jetpack Compose. I connect the interface, application state, data and backend communication into an architecture that can evolve safely after the first release.

Scope

I can deliver a complete first application version, a mobile client for an existing API or a focused module in a product already under development.

01KRYTERIA

When this service is a good fit

A native application is a strong choice when the product relies on Android capabilities, needs a responsive interface and requires a considered architecture.

02ZAKRES

What the work can include

The application scope follows the key user flows. I build a reliable foundation first and only then add features that are not required to validate the product.

  1. 01

    Analysis of the main scenarios and first-release scope.

  2. 02

    Screen, navigation, state and data-flow architecture.

  3. 03

    A Jetpack Compose interface aligned with Material 3.

  4. 04

    REST API integration, loading states and error handling.

  5. 05

    A data layer and backend communication.

  6. 06

    Biometrics, secure data storage and automatic locking.

  7. 07

    Testing of critical scenarios and release preparation.

03PRZYKŁADY

Example solutions

A customer application for an online service or platform.

A mobile dashboard for employees or business customers.

An application that supports field work.

A product with user accounts and notifications.

Extending an existing application with a screen or integration.

04PROCES

How the collaboration works

I organize the work around real user scenarios. The first version therefore contains a coherent flow rather than a collection of unfinished screens.

  1. Scope and user flows

    We define the main problem, essential screens, data sources and functions required for the first release.

  2. Application architecture

    I design navigation, state, API communication and the application's data layer.

  3. Implementation and regular previews

    I build in stages and provide working flows for testing instead of postponing integration until the end.

  4. Testing and release preparation

    I refine edge cases, performance, configuration and the elements required for release or continued development.

05TECHNOLOGIE

Mobile application stack

I use tools suited to modern Android development, while keeping architecture more important than the number of libraries in the project.

Platform and interface

  • Kotlin
  • Android
  • Jetpack Compose
  • Material 3

State and architecture

  • Coroutines
  • Kotlin Flow
  • Dagger Hilt

Data and integrations

  • Room
  • REST API
  • biometrics

Quality

  • testing

06Related project

07Related services

Have an Android application idea?

Describe the users, main flow and existing backend. I will help define a useful first version.