z.systems, a VC‑backed tech company transforming traditional retail across Africa, seeks a Senior Mobile Developer to spearhead the development and continuous improvement of its cross‑platform mobile applications. The successful candidate will work closely with product, design, and backend teams to deliver high‑performance, stable, and scalable experiences on both Android and iOS devices.

Key Responsibilities:

• Lead the end‑to‑end development of mobile applications using React Native, ensuring code quality, maintainability, and adherence to best practices.
• Implement new features, refactor existing code, and optimize performance, memory usage, and battery consumption across a wide range of devices and OS versions.
• Manage the full mobile lifecycle: development, debugging, testing, CI/CD, OTA updates, and store releases (Google Play Store and Apple App Store).
• Configure and maintain Expo EAS builds, multi‑environment setups, and automated deployment pipelines.
• Ensure seamless integration with backend services via REST or GraphQL APIs, maintaining high reliability and consistency.
• Collaborate with backend engineers to design and implement efficient data synchronization, caching strategies, and offline support.
• Participate in code reviews, architectural discussions, and knowledge sharing sessions to elevate the overall engineering culture.
• Stay updated on the latest mobile technologies, frameworks, and industry trends to continuously improve the product.

Required Profile:

• 3+ years of professional mobile development experience, with a strong focus on React Native.
• Proven track record of delivering production‑grade apps on both Android and iOS platforms.
• Deep understanding of performance profiling, memory optimization, and native module integration.
• Experience with CI/CD pipelines, OTA updates, and app store publishing processes.
• Strong command of TypeScript, Expo, and native development tools (Android Studio, Xcode).
• Excellent communication skills, a product‑driven mindset, and the ability to work autonomously.

What We Offer:

• Competitive salary and benefits package.
• Hybrid working model with flexible remote options.
• Opportunity to work on cutting‑edge technology in a fast‑growing startup environment.
• Collaborative culture that values innovation, ownership, and continuous learning.

Join z.systems and help shape the future of retail across Africa by building a seamless, digitally connected ecosystem that empowers independent grocery stores and enhances consumer experiences.