Mobile Engineer – iOS & Kotlin Multiplatform

About the role

Rakuten TV is seeking a Mobile Engineer to join its Barcelona team, focusing on both native iOS development and Kotlin Multiplatform solutions for its video‑streaming products that serve millions of users across Europe.

Key responsibilities

• Maintain and evolve a high‑quality native iOS application used by millions.
• Design and implement new cross‑platform features using Kotlin Multiplatform Mobile (KMM) and Compose Multiplatform.
• Write clean, idiomatic Swift code and contribute shared business‑logic, networking, and data layers in Kotlin.
• Collaborate with developers, QA engineers, designers, and product owners from concept through deployment and maintenance.
• Ensure robust testing and follow Agile/Scrum processes.

Required profile

• 3+ years of professional iOS development experience with Swift (and Objective‑C knowledge).
• Hands‑on experience with Kotlin and Kotlin Multiplatform, able to maintain shared modules.
• Comfortable working simultaneously on native Swift codebases and KMM projects.
• Strong commitment to code quality, testing, and clean architecture.
• Experience with Agile/Scrum methodologies and proactive technology research.

Required skills

• Swift, SwiftUI, Objective‑C
• Kotlin, Kotlin Multiplatform, Kotlin Coroutines, Flow
• Compose Multiplatform (or Jetpack Compose)
• Koin (dependency injection)
• Combine, Swift Concurrency
• Swift Package Manager
• Clean Architecture, feature modularisation
• tvOS, AVPlayer, Chromecast SDK, UIKit
• Fastlane, Appium