Hire Android Developers Who Handle Device Fragmentation

How to vet an Android developer

Modern Android development means Kotlin, coroutines and Jetpack Compose, built on Google's recommended architecture. Beyond syntax, a strong developer understands the Android lifecycle deeply: configuration changes, process death, background execution limits and how manufacturers' battery optimizations change behavior on real devices. These details separate apps that work in the emulator from apps that work in users' hands.

Ask candidates about the device range they have supported and how they tested it, how they handled Play Store policy changes such as target API level updates, and how they diagnosed crashes or ANRs reported in Play Console. Experience shipping to budget phones with limited memory and unreliable networks is especially valuable for apps aimed at Indian users.

Language background matters less than it once did, since most Android code is now written in Kotlin and older Java codebases are being migrated. Our Kotlin vs Java comparison covers the differences, and candidates comfortable in both languages are especially valuable for apps in the middle of that transition.

• Fluent Kotlin with coroutines and flows.
• Comfortable building screens in Jetpack Compose.
• Understands process death and state restoration.
• Has fixed real crashes and ANRs from Play Console data.
• Tests on a range of devices, not only flagship phones.

Interview questions we use for Android developers

We ask questions grounded in production problems and listen for specifics: the tools a candidate used, the trade-offs they weighed and what they would do differently now. Familiarity with Jetpack Compose and Kotlin idioms is assumed; we probe how candidates apply them under real constraints.

• How does your app survive process death, and what state do you restore?
• Explain structured concurrency with coroutines and how cancellation propagates.
• What causes unnecessary recomposition in Compose, and how do you detect it?
• How do you schedule reliable background work on phones with aggressive battery optimization?
• How would you reduce app size and cold start time?
• How do you handle runtime permissions added in recent Android versions?

Onboarding an Android developer in the first two weeks

Week one covers access and context: repositories, CI, Play Console with appropriate permissions, crash dashboards and design files. The developer builds the app on several physical devices, reads the module structure and coding conventions, and picks up small bugs that touch different parts of the codebase, getting used to the team's review process along the way.

Week two moves to ownership: a small feature or improvement delivered through code review, tests and an internal testing track release. The developer also reviews current crash and ANR reports to understand where the app struggles. A short retrospective with the team lead at the end of week two sets the areas they will own going forward.

Device coverage is part of onboarding too. The developer should agree with the team which phones and Android versions to test on, how crash and ANR thresholds are monitored, and how releases move through staged rollouts, so quality expectations are clear before they ship features to real users.