Senior Kotlin Multiplatform Engineer - YOnC SDK

Stack

Responsibilities

• ▹Build and maintain the KMP shared core: business logic, state machines and data models used by both Android and iOS clients
• ▹Design the shared module's public API: what it exposes to platform-specific code and what stays internal
• ▹Keep the shared module platform-clean: no Android-only imports, plain data classes and suspend functions at the platform boundary
• ▹Wire up dependency injection using Metro (a newer DI tool similar to Dagger/Anvil)
• ▹Package the iOS side as an XCFramework and handle Kotlin/Native interop correctly for Swift consumers
• ▹Build and maintain a Jetpack Compose benchmark app on Android to validate the shared core
• ▹Work with the Android and iOS engineers to migrate their existing native code onto the shared core

Requirements

• ▹Production experience with Kotlin Multiplatform: shared module design, expect/actual, judgment on platform boundaries
• ▹Experience building and shipping an SDK or library consumed by other developers and deciding what belongs in a public API
• ▹Dependency injection experience (Dagger, Anvil, Hilt, Koin or similar); able to pick up Metro quickly
• ▹Working knowledge of Swift and iOS development, including Kotlin/Native interop and Objective-C/Swift bridging
• ▹Jetpack Compose experience
• ▹Strong Kotlin fundamentals: coroutines, suspend functions, structured concurrency

Nice to have

• ▹Compose Multiplatform experience (not needed now, but a likely future direction)
• ▹Familiarity with Kotlin/Native specifics: memory model, concurrency constraints, interop edge cases
• ▹Android or iOS production experience beyond KMP itself
• ▹On-device AI/ML experience

What we offer

• ▹Remote, flexible work

About the company

Yo is building an AI inference platform that runs directly on smartphones, turning the phone in your pocket into part of a global AI network.