Hire Android Developers — Kotlin & Jetpack Experts

Jetpack Compose is our default for all new Android projects. It is the direction Google is investing in, produces significantly less boilerplate than XML layouts, and integrates naturally with Kotlin and the Jetpack lifecycle. For existing XML-based codebases, we work with Views and can incrementally introduce Compose in new screens using the interoperability layer.

Standard start time is 48 hours from contract signing. For developers with specific expertise (e.g., Android Automotive, Wear OS, Google Pay), one week is typical. We maintain bench capacity for standard Android phone and tablet development at all times.

Android fragmentation — thousands of device models, screen sizes, OS versions, and OEM customisations — is managed through a layered strategy. We set a minimum SDK that covers 95%+ of active devices, use adaptive layouts that work across screen sizes, test on real devices representing the target audience (via Firebase Test Lab), and use the Jetpack compatibility libraries to backport modern APIs safely.

Yes. Our developers configure signing with upload keys, set up Play App Signing, create Play Console listings with all required metadata, configure content ratings, prepare privacy policies, manage release tracks (internal, closed, open, production), and automate the entire pipeline with Fastlane supply. They know the policies and design the app to avoid the most common rejection reasons.

Yes. We implement Google Play Billing Library for one-time purchases and subscriptions. This includes Play Console product configuration, purchase flows with proper loading and error states, server-side purchase token validation with the Google Play Developer API, entitlement management, and a reliable restore purchases implementation.

We follow the official Google recommended architecture: MVVM with a UI layer (Compose), domain layer (use cases), and data layer (repositories). ViewModel manages UI state with StateFlow, Hilt handles dependency injection, and Navigation Compose manages screen routing. This architecture is well-documented, testable, and familiar to any Android engineer who joins the project later.

Yes. We regularly join mature Android codebases — adding features, fixing bugs, upgrading deprecated APIs, migrating from Java to Kotlin, or modernising from XML Views to Jetpack Compose. We start with a code and architecture review, align with your conventions, and contribute within the first sprint.

All background work goes through WorkManager — it survives app restarts and device reboots, respects battery optimisation policies (Doze mode), and works correctly across all Android versions and OEM battery management implementations. Kotlin Coroutines handle in-process async operations. We avoid raw Service components for background work except where truly necessary.

We write unit tests with JUnit 5 and MockK for business logic and ViewModel behaviour, integration tests for database operations with Room's in-memory test variant, and UI tests with Compose UI testing APIs. End-to-end tests run on Firebase Test Lab across a matrix of real devices. Tests run in CI on every pull request, blocking merges when they fail.

Battery and performance are first-class concerns on Android given the diversity of hardware. We use Android Studio's CPU, Memory, and Energy Profilers to measure before optimising. Specifically: WorkManager with appropriate constraints for background tasks, LeakCanary for memory leak detection, strict mode during development to catch main-thread violations, and baseline profiles for faster startup.

Yes. Adaptive layouts are a core skill for Kultrix Android developers. We design with window size classes, implement two-pane layouts for large screens using Jetpack NavigationSuiteScaffold, and test on a range of emulated and real tablet configurations. Supporting tablets is increasingly important now that Android tablets have grown significantly in market share.

Monthly retainer and time-and-materials models are both available. Retainer engagements offer fixed hours per month with guaranteed developer availability. T&M engagements are billed weekly against tracked hours. Both models include weekly progress reports, a dedicated account manager, and transparent timesheets. Minimum engagement is one month.