Senior Mobile Developer

**Czym będziesz się zajmować?** Project and role: * Support advertising delivery and display in a high traffic native iOS application for a major Polish e commerce platform. * Work at the intersection of native mobile development and AdTech, applying IAB standards while balancing monetization, user experience and main thread performance. * Use JavaScript in WebViews to investigate ad creative event reporting while maintaining the native technology stack. * Work 100% remotely with flexible organization, long term cooperation in a stable ecosystem and regular integration meetings. Responsibilities: * Integrate video, display and native ad formats in the main application. * Optimize video ad playback, transitions and tracking events. * Collaborate with Core Mobile teams on architecture, security and performance. * Maintain GDPR consent management and adapt privacy solutions to system changes. * Debug issues across native code, advertising SDKs and web creatives. * Design communication between the mobile app and advertising systems. * Support high traffic scale and work with reactive programming, Jetpack Compose, coroutines, A B testing, open source and Agile Scrum. **Kogo poszukujemy?** Key requirements: * Over 5 years of commercial experience developing native iOS applications with Swift. * In depth understanding of MVVM, MVI and Clean Architecture. * Practical WebKit and WKWebView experience, including WKScriptMessageHandler and native to web communication. * Solid JavaScript, HTML and CSS knowledge for web advertising integration and debugging. * Experience with REST APIs, asynchronous programming and efficient data processing. * Proficiency in unit and integration testing, plus knowledge of Git, software engineering principles, data structures and algorithms. Additional competencies: * Reactive programming with RxJava, RxKotlin or Combine, plus Jetpack Compose and coroutines. * Experience with A B testing frameworks, open source or a strong GitHub profile, and Agile Scrum. * Proactive problem solving and focus on excellent user experience. **Czego wymagamy?** 5 lat doświadczenia na podobnym stanowisku Znajomości: * iOS * Swift * MVVM * MVI * Clean Architecture * Unit testing * Integration testing Mile widziane: * WebKit * WKWebView * WKScriptMessageHandler * JavaScript * HTML/CSS Języki: * Polski * Angielski **Jakie warunki i benefity otrzymasz?** * 20k–24k PLN netto/m (B2B) * B2B - Elastyczne godziny pracy (100%) * Praca zdalna: W całości **Kim jesteśmy?** We provide complete software development teams, who will take complex care of your software. We are experienced in building teams uniquely suited to the specific needs of our clients. One team - a range of skills, diverse personalities, and various approaches.