Kotlin, Jetpack Compose, Play Console
Hire Android Developers Who Write Modern Kotlin and Keep You Compliant on Google Play
When you hire Android developers through us, you get Kotlin engineers who build in Jetpack Compose, structure work with Coroutines and Flow, and know how Play Console releases and policy deadlines work. You interview each candidate and start with a two-week trial on your own backlog.
Below is a skills matrix by seniority, the interview questions we would ask, typical tasks, and a first-fortnight onboarding plan.
- Kotlin and Jetpack Compose
- API 36 target ready
- Two-week trial on real tickets
- Code in your repository from day one
When it makes sense to hire Android developers
Android carries most of the world’s phones. StatCounter’s September 2026 figures show Android at 69.2% of mobile usage worldwide, and the device range is far wider than on iOS: screen sizes, OEM skins, aggressive battery savers. A developer who has fought those problems before is worth more than one who has only used a Pixel emulator.
Platform rules also move every year. Under Google Play’s target API requirements, from August 31, 2026 new apps and updates must target Android 16 (API level 36) or higher, with an extension available to November 1, 2026, and existing apps must target API 35 or higher to stay visible to new users on newer devices. Each bump can change permissions, background work and edge-to-edge layout behaviour, which is steady work for a dedicated Android engineer or an app maintenance and support retainer.
Android developer skills matrix by seniority
Pick the level that fits your Kotlin codebase. A legacy Java and XML app with a Jetpack Compose migration ahead needs at least one senior to plan it.
| Skill | Junior | Mid-level | Senior |
|---|---|---|---|
| Kotlin | Null safety, data classes, extension functions | Sealed classes, generics, idiomatic collections; reads Java comfortably | Designs modules and public APIs; leads Java-to-Kotlin migration |
| Coroutines / Flow | Launches coroutines in viewModelScope | StateFlow vs SharedFlow, structured concurrency, cancellation, dispatchers | Designs reactive data layers; tests flows deterministically |
| Jetpack Compose | Builds screens from Figma | State hoisting, recomposition, navigation, interop with Views | Performance tuning, design system components, incremental migration plan |
| Room | Entities, DAOs, simple queries | Migrations, relations, Flow queries, offline-first caching | Sync strategy, conflict resolution, schema evolution under real user data |
| Hilt | Injects dependencies into ViewModels | Scopes, modules, test replacements | Dependency graph design across feature modules |
| WorkManager | Schedules a simple one-off job | Constraints, chaining, periodic work, expedited jobs | Background strategy that survives Doze and OEM battery savers |
| Play Console | Uploads to internal testing | Staged rollouts, pre-launch reports, Data safety form, policy rejections | Release trains, target API planning, Play Integrity and billing setup |
Rates depend on seniority, hours and engagement length, and we quote each brief in writing. As market context, 13 of the 16 Pakistani firms with a stated rate on page one of Clutch’s directory (October 2026) list $25 to $49 an hour; that is market data, not our price.
Typical tasks for Android developers
These are the tickets our Android developers most often take on in the first months with a client.
Compose features
New screens built in Jetpack Compose against your design system, with ViewModel tests.
View-to-Compose migration
Replacing XML screens one at a time with ComposeView interop so releases continue.
Target API upgrades
Raising targetSdk, fixing permission and foreground service changes, and edge-to-edge layout issues.
Offline and sync
Room caching, WorkManager sync jobs and conflict handling for patchy mobile networks.
Stability work
Crashlytics triage, ANR investigation, memory leaks traced with LeakCanary and profiling.
Release management
Internal testing tracks, staged rollouts, pre-launch report fixes and policy responses.
Interview questions to ask when you hire Android developers
Ask for reasoning, then push on one detail. Strong candidates get more precise when pressed; weak ones get more general.
- What is the difference between StateFlow and SharedFlow, and which would you expose from a ViewModel? Expect conflation, initial value, replay, and why one-off events need care.
- What happens to a coroutine launched in viewModelScope when the user rotates the device? It survives configuration change because the ViewModel does; it is cancelled when the ViewModel is cleared.
- What causes unnecessary recomposition in Compose, and how do you find it? Unstable parameters, lambdas recreated each pass, reading state too high; Layout Inspector recomposition counts.
- How do you write a Room migration and test it? Migration objects, exported schemas, MigrationTestHelper, and never relying on destructive fallback in production.
- When would you use WorkManager instead of a coroutine? Work that must complete even if the app is killed or the device restarts, with constraints such as network.
- How does Hilt scoping work, and when have you got it wrong? Singleton vs ViewModel vs activity scopes; candid answers about leaks or duplicated instances are a good sign.
- Our app must target API 36. What would you check first? Behaviour changes for the new target, permissions, foreground service types, edge-to-edge, and running the app on the latest OS image.
- How do you investigate an ANR reported in Play Console? Main-thread blocking, disk or network on the main thread, lock contention; reading the stack traces in Android vitals.
- How would you structure a multi-module project? Feature modules, core modules, build times, and dependency direction.
- How do you handle a Play policy rejection? Read the policy cited, fix and document, reply through the console, and check the Data safety form matches actual behaviour.
Finish with a code review exercise on a real pull request from your repository. It shows how the developer will behave in your team day to day.
Shortlist Android developers you can interview this way
Send the brief and the questions you plan to ask. We will match profiles against them and include our own interview notes for each candidate.
Onboarding plan for the first two weeks
The two weeks double as the trial, so each step produces evidence for the end-of-trial decision.
Days 1–2: access and a running build
Repository, Play Console role, Firebase, Figma, Slack and the board. Goal: a debug build running on a physical device and the emulator.
Days 3–4: vitals and policy read-through
Crash and ANR rates in Android vitals against Google’s thresholds, the Data safety form and the current targetSdk, with a small bug fix merged through review alongside.
Days 5–7: first feature ticket
A scoped Compose feature with tests, checked on the cheapest phone in your device list as well as a recent one.
Days 8–10: release and background check
A build on the internal testing track, the pre-launch report reviewed, and the Doze and App Standby tests below run against your sync and notification flows.
Day 10: trial review
Review pull requests, communication and estimates together. Continue, request a replacement or stop.
Background-work test matrix: Doze, App Standby and battery savers
Most “it works on my phone” Android bugs are background bugs. Android’s power rules defer work, and Google’s App Standby documentation notes that every manufacturer can set its own criteria for how idle apps are restricted. A developer worth hiring tests these conditions before release. Hiring itself follows hire mobile app developers, and app development engagement models compares the options.
| Condition | How to trigger or check it | What must still work |
|---|---|---|
| Doze (unplugged, still, screen off) | adb shell dumpsys deviceidle force-idle, then unforce and dumpsys battery reset | Deferred WorkManager sync runs in the next maintenance window and the app recovers cleanly |
| App Standby (app not used for a while) | adb shell dumpsys battery unplug, then am set-inactive with your package name | Notifications and jobs resume once the app is made active again |
| Restricted bucket (Android 12+) | adb shell am get-standby-bucket; jobs run once a day in a 10-minute batch | Nothing critical depends on background jobs alone; push or a user-visible flow covers it |
| Alarms while idle | setExactAndAllowWhileIdle, which fires at most once per nine minutes per app | Reminders for bookings or medication arrive close enough to the set time |
| Manufacturer battery savers | Real devices matching the top models in your Play Console data, battery settings left at default | Sync, notifications and uploads on every model, not just a Pixel |
Commands from Android’s Doze and App Standby documentation. The device list comes from your own install data.
When you should not hire an Android developer
If your product needs identical features on Android and iPhone and is not hardware-heavy, a single cross-platform engineer can be the leaner option. Look at our Flutter developers before you hire two native specialists.
And if your app is mainly an iOS product with a small Android audience, a part-time engagement or a fixed-scope update may make more sense than a full-time Android hire.
Questions about hiring Android developers
Why do our syncs or notifications fail on some Android phones?
Usually because of power management. Doze defers jobs, alarms and network access while a phone is idle, App Standby buckets limit apps that are rarely opened, and Google says each manufacturer sets its own criteria for those buckets. A good Android developer reproduces the failure with the adb commands above, then moves critical work to push messages or user-visible flows.
Do your Android developers use Jetpack Compose?
Yes. Compose is Android’s recommended UI toolkit and our default for new screens. We also screen for XML Views experience, because most apps older than a few years still contain them and need an incremental migration rather than a rewrite.
Can the developer handle Google Play target API deadlines?
Yes. Mid-level and senior developers plan target SDK upgrades as routine work: reading behaviour changes, fixing permission and background-work issues, and testing on the newest Android release before the Play deadline rather than after a warning email. We also watch the extension window so a late upgrade never blocks an urgent release.
What do Android vitals thresholds mean for our app?
They affect visibility. Google treats a user-perceived crash rate above 1.09%, or an ANR rate above 0.47%, as bad behaviour, measured over 28 days, with an 8% limit per phone model. Going over can reduce your app’s visibility on Google Play and add a warning to the listing. A developer should watch vitals weekly and fix the worst model first.
Who owns the Play Console account?
You do. The app stays in your Google Play Console, and you grant the developer access with the permissions you choose. We never take ownership of your developer account, upload keys or store listings, and you can revoke access the day the engagement ends without any handover from us.
We are opening a new Play developer account. Anything to plan for?
Yes, time. Personal Play developer accounts created after 13 November 2023 must run a closed test with at least 12 opted-in testers for 14 days in a row before applying for production access, and opting out restarts the count. Your developer can set up the closed track in the first week, so the test runs while features are still being built.
Find the Android developer your roadmap needs
Tell us your Kotlin stack, seniority and hours. We will send matched Android developer profiles with interview notes, and you choose who starts the trial.