CodeSubmit Library

Kotlin Developer Assessment

Evaluate Kotlin developers with real-world assessments that mirror actual Android development workflows. Our Kotlin assessments cover modern Android development patterns, Kotlin-specific features, and cross-platform development with Kotlin Multiplatform.


Test candidates on coroutines, null safety, extension functions, and other Kotlin language features that make it superior to Java for Android development.

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Why Kotlin Assessment Matters

Kotlin is now Google's preferred language for Android development, offering improved safety, interoperability, and developer productivity. Our assessments help you identify developers who can leverage Kotlin's modern features effectively.


Evaluate expertise in Kotlin coroutines, data classes, sealed classes, and other language features that enable robust Android applications.

1+ Kotlin frameworks available on CodeSubmit

The communication between hiring managers, recruiters and candidates has been incredibly improved since we started using CodeSubmit. There is no 'back and forth' anymore and the technical assessment is running smoothly!

Virginie Raucoules
Virginie Raucoules
P&C Manager @ KONUX
Virginie Raucoules

Authentic tasks, not algorithm puzzles.

Take-Home Coding Challenges

Our extensive library of practical coding challenges provides an accurate assessment of candidate programming abilities while delivering a respectful and engaging interview experience.

Authentic engineering challenges:
Coding assessments that mirror real development work, helping top engineering teams recruit more effectively, intelligently, and fairly.
Comprehensive challenge library:
Select from hundreds of programming challenges spanning junior to senior architect levels, supporting all major languages and frameworks -- or create your own custom challenges.
Developer-friendly workflow:
Our innovative Git-based approach enables candidates to code on their preferred machines, using familiar tools, and working at their own pace.
Seamless interview integration:
Transition directly from completed challenges to CodePair live coding sessions for deeper technical conversations and code reviews.
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Example of a take-home coding challenge on CodeSubmit