Senior Backend Engineer – SaaS Platform. Lead backend architecture, refactor production systems, design multi‑tenant isolation, optimize PostgreSQL, and drive reliability for a growing SaaS platform. Remote role based in Casablanca.

z.systems is looking for a Senior Mobile Developer with expertise in React Native to build and maintain cross‑platform mobile applications for its digital retail ecosystem. The role focuses on Android and iOS development, integrating Firebase, REST/GraphQL APIs, and managing CI/CD pipelines. Candidates will use Expo & EAS Build, native modules, Android Studio, Xcode, OTA updates, and publish apps on Google Play Store and Apple App Store. The position is based in Casablanca, offers a full‑time CDI contract, and requires 3‑5 years of experience and a BAC +5 degree.