Senior Mobile Engineer (iOS / Android)

Senior Mobile Developer iOS/Android responsible for designing, developing, and maintaining SDKs for integration with an advertising system for mobile applications. The role includes being a technical leader to create high-quality SDKs that are easy to integrate and enable mobile app developers to monetize through the advertising platform, focusing on high performance, stability, and minimal impact on client app performance.

• Minimum 5-6 years of experience in mobile application development for iOS and/or Android.
• Very good knowledge of Swift and/or Kotlin, with good knowledge of Objective-C and Java.
• Experience in creating and publishing SDKs or libraries for mobile platforms.
• Deep knowledge of iOS SDK (UIKit, Foundation) and/or Android SDK.
• Practical knowledge of integration with RESTful API, WebSockets, and real-time protocols.
• Experience with CI/CD tools for mobile.
• Ability to write unit and UI tests (XCTest, Espresso, JUnit).
• Knowledge of App Store and Google Play Store guidelines and review processes.
• Experience with debugging tools: Xcode Instruments, Android Profiler, Charles Proxy.
• Excellent skills in documenting code and APIs.
• Understanding of modern software development methods using Agentic Coding (GitHub Copilot, Claude Code).

Nice to have:

• Experience integrating mobile advertising SDKs (Google Mobile Ads SDK, Facebook SDK, MoPub).
• Knowledge of cross-platform frameworks: React Native, Flutter, Unity, Xamarin.
• Knowledge of SKAdNetwork (iOS) and Google Play Install Referrer API.
• Experience with VAST/VPAID for mobile video ads.
• Knowledge of privacy-preserving advertising mechanisms (differential privacy, on-device processing).
• Experience with A/B testing and feature flags in SDK context.
• Publication of own apps or open-source libraries/SDKs.
• Knowledge of OpenRTB and header bidding protocols for mobile.

• Design and develop native SDKs for iOS (Swift/Objective-C) and Android (Kotlin/Java).
• Create wrappers and plugins for popular cross-platform frameworks such as React Native, Flutter, Unity, Ionic.
• Optimize SDKs for size, battery consumption, and performance.
• Create comprehensive technical documentation and sample applications.
• Provide technical support for developers integrating the SDK.
• Implement tracking and analytics mechanisms with privacy preservation.
• Manage SDK versions and publish to repositories (e.g., CocoaPods, Maven Central, npm).
• Collaborate with backend team on API and communication protocols.