Senior Native Mobile App Engineer Role summary We are looking for a highly skilled Mobile Engineer to lead the design development and maintenance of our cross-platform Software Development Kits SDKs In this role you will build the core libraries that power our services within third-party applications Your goal is to create high-performance lightweight and developer-friendly tools that work seamlessly across the Android and iOS ecosystems Key activities Architect Build Design and develop native SDKs from scratch using Kotlin Android and Swift iOS API Design Create clean intuitive and idiomatic APIs that make integration easy for external developers Performance Optimization Ensure the SDK has a minimal footprint binary size memory usage and battery impact to avoid negatively affecting host apps Binary Distribution Manage the lifecycle of SDK distribution via Maven Central for Android and Swift Package Manager SPM CocoaPods or XCFrameworks for iOS Stability Compatibility Maintain strict backward compatibility and semantic versioning Ensure the SDK is robust enough to handle the unpredictable environments of thousands of different host apps Documentation Tooling Write technical integration guides create sample applications and maintain Quickstart repositories to reduce developer friction Cross-Functional Collaboration Work with backend teams to define productive networking protocols REST gRPC and security teams to ensure data privacy Technical Profile Requirements Core Engineering Kotlin Expert Deep understanding of Coroutines Flow and Android Jetpack libraries Swift Expert Mastery of Swift Concurrency async await Combine and low-level iOS frameworks Foundation Network Concurrency Strong experience handling multi-threading and asynchronous operations in a library environment Security Knowledge of secure data storage Keychain EncryptedSharedPreferences and network security SSL pinning Core Engineering Dependency Management Proven ability to build libraries with zero or minimal external dependencies Modular Architecture Experience with Clean Architecture or SOLID principles applied to library modules Build Systems Proficiency with Gradle Kotlin DSL and Xcode build settings schemes CI CD Experience setting up automated pipelines for testing and publishing libraries e g GitHub Actions Bitrise Soft Skills Developer Empathy You think like a customer You care about how long it takes a new dev to get Hello World running with your SDK Technical Writing Ability to explain complex technical logic in simple clear documentation Nice to Have Experience with Kotlin Multiplatform KMP for shared business logic Experience with C or Rust for low-level cross-platform performance Contributions to open-source mobile libraries Familiarity with React Native or Flutter bridges to wrap your native SDKs Why this role is unique Unlike app developers who build for end-users you are building the engine Your code will run inside hundreds of different apps facing unique edge cases and scale challenges that standard app development rarely encounters Goodyear is one of the world s largest tire companies It employs about 68 000 people and manufactures its products in 51 facilities in 19 countries around the world Its two Innovation Centers in Akron Ohio and Colmar-Berg Luxembourg strive to develop state-of-the-art products and services that set the technology and performance standard for the industry For more information about Goodyear and its products go to Goodyear is an equal employment opportunity employer All qualified applicants will receive consideration for employment without regard to any characteristic protected by law