Senior Kotlin Native Developer (+ Multiplatform)

1dea is an IT consulting recruitment company providing services to acquire top IT talents for its clients. Operating in the Polish market for over 8 years, it is expanding its services to Western European markets.

• 5+ years of experience in professional mobile application development with strong Kotlin ecosystem foundation
• Deep practical knowledge of Kotlin Multiplatform and Kotlin/Native, including interop with Objective-C/Swift and native object lifecycle
• Mastery of API protocols, security, and modern client-server interaction standards
• Experience in test automation for shared logic and maintaining stable CI/CD pipelines
• English language proficiency at minimum B2+ level
• Architectural skills to cleanly separate business logic from platform-specific frameworks

Nice to have:

• Experience with Ktor, SQLDelight, Kotlinx.Serialization libraries
• Knowledge of iOS platform specifics (Swift/Xcode) sufficient to debug interactions with shared module

• Design and implement shared module (Kotlin/Native) for Android and iOS
• Manage JVM vs Kotlin/Native differences, including memory management and low-level business logic
• Develop reactive networking and persistence mechanisms
• Design API contracts, authentication, and versioning
• Handle serialization, error handling, and retry strategies
• Develop testing strategies (Unit, Integration, E2E) and integrate with CI/CD pipelines