z.systems, a fast‑growing Moroccan tech startup, is seeking a Senior Mobile Developer to lead the design, development, and maintenance of its cross‑platform mobile applications. The role focuses on building high‑quality, performant apps for Android and iOS using React Native, TypeScript, Expo, and EAS Build. The ideal candidate will have deep expertise in native modules, Android Studio, Xcode, OTA updates, Firebase, REST/GraphQL APIs, CI/CD pipelines, and app store publishing. This position offers a hybrid work model in Casablanca, with a strong emphasis on AI‑driven retail solutions and a collaborative, innovative culture.