Helfie - Mobile Developer - Android/iOS

Required Skills & Experience: - Experience: 4 - 8 years of professional mobile development experience, with a track record of shipping and maintaining production apps. - Platform Expertise: Hands-on experience with at least one native platform - Android (Kotlin + Jetpack Compose) or iOS (Swift + SwiftUI) - is required; working experience with both platforms is a plus. - Cross-Platform Framework: Hands-on experience with at least one cross-platform framework (Kotlin Multiplatform, Flutter, or React Native) is required. Experience with Kotlin Multiplatform (KMP) specifically is preferred. - Scale: Experience working on apps with a large, active user base, with an understanding of the performance, reliability, and release challenges that come with scale. - Mobile Landscape Awareness: Good understanding of the broader mobile technology landscape and tradeoffs between native and cross-platform approaches, and ability to reason about when to use what. - CI/CD: Practical experience maintaining CI/CD pipelines for mobile (GitHub Actions, Fastlane, or equivalent), including build automation and code signing. - Testing: Experience writing unit and UI tests; familiarity with automated testing frameworks. - Performance & Reliability: Experience optimizing app startup time, memory usage, and rendering performance; comfortable diagnosing and fixing performance regressions. - Crash Tracking & Debugging: Hands-on experience with crash reporting and diagnostics tools (e.g., Crashlytics), triaging crash reports, and driving root-cause fixes. - Kotlin Internals: Solid understanding of Kotlin language internals (coroutines, sealed classes, inline/reified functions, memory model) beyond surface-level syntax. - Multithreading & Concurrency: Practical experience with multithreading and concurrency patterns on mobile (coroutines/structured concurrency, GCD/Dispatch, thread safety, background processing).