Our leading client is looking for Mobile Apps Developer (iOS & Android) based at London. Familiarity with the Android Native UI or iOS Objective-C UI components. Familiarity with .NET MAUI for cross-platform development. Experience using Android Studio IDE (Windows) or Xcode IDE (macOS). Qt mobile GUI development skills using Qt, Qt Quick, or QML. Experience developing apps on Windows, with Visual Studio utilising Xamarin. Experience in 2D/3D graphics, including OpenGL, Shaders, OpenSceneGraph, or Vulkan. Knowledge of GIS mapping toolkits or components such as GDAL, ESRI, MapBox, or Google Maps. Familiarity with Apple App Store developer processes, including code signing and deployment using TestFlight. Experience as a Google Play Store developer, including app publishing (APK, AAB). Skills in C/C++ desktop development for Windows using Visual Studio IDE. Experience with Continuous Integration (CI) tools, including JIRA, Git, Jenkins, Java, bash, batch scripts, and CMake