HOW TO HIRE A KOTLIN DEV

Kotlin idioms (extension functions, DSL building, inline functions), asynchronous programming with Coroutines and Flow, and thorough null safety understanding are critical. Also verify experience with Kotlin Multiplatform (KMP), Android interoperability (Java-to-Kotlin migration, existing library integration), and functional programming thinking (immutability, higher-order functions).

Developers who write Java-style Kotlin (`!!` abuse, excessive mutable variables) fail to leverage the language's strengths. Those who ignore Coroutines and Flow and write thread-blocking code are unsuited for modern Android development. Low null safety awareness and habitual use of nullable types will generate long-term bugs. Developers who don't write tests (unit, integration) are also a red flag.

1. Portfolio review: Check actual Android apps or KMP projects written in Kotlin. 2. Technical interview: Deep dive into Coroutine scope management, Flow backpressure handling, and null safety design decisions. 3. Practical assignment: Have them build a simple API integration app within 4 hours and evaluate code quality, architecture decisions, and error handling. 4. Culture fit: Verify remote work experience, async communication skills, and self-direction.

A great Kotlin developer maintains Java compatibility while maximizing Kotlin's modern features. Mastery of the three pillars—asynchronous processing, null safety, and functional programming—is key to hiring the right person. If hiring is difficult, starting with a flexible fractional contract is pragmatic.

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I can advise on your hiring process, support technical interviews, or join directly as your Kotlin engineer.