z.systems is a dynamic, VC‑backed technology enterprise that is redefining the traditional retail landscape across the African continent. By building a comprehensive B2B2C digital ecosystem, the company connects independent grocery retailers with global brands, enabling seamless product availability, real‑time pricing, and in‑store visibility. Simultaneously, it drives consumer engagement through personalized promotions, gamified loyalty programs, and flexible payment options such as buy‑now‑pay‑later. This dual‑facing approach transforms informal retail into a connected, data‑driven network that delivers a modern trade experience without the heavy capital expenditures typically associated with large retailers. With over twenty thousand retailers onboarded and more than nine hundred thousand orders processed, z.systems is rapidly scaling its impact across multiple African markets.
The core of z.systems’ value proposition lies in its loyalty engine, which unifies brands, retailers, and consumers into a single, frictionless ecosystem. By aggregating transactional data, the platform identifies buying patterns, optimizes inventory levels, and provides actionable insights to retailers, helping them reduce waste and improve profitability. For brands, the marketplace offers a direct channel to reach end‑customers, bypassing traditional distribution bottlenecks. Consumers benefit from dynamic pricing, instant rewards, and a seamless checkout experience that blends online convenience with offline accessibility. This integrated model not only enhances customer satisfaction but also creates a virtuous cycle of data enrichment and revenue growth for all stakeholders.
As a Senior Mobile Developer – React Native, you will be at the forefront of delivering this vision to end‑users through high‑quality mobile applications. Your primary responsibility will be to architect, develop, and maintain the cross‑platform mobile stack that powers the retailer and consumer apps. You will translate product requirements into scalable, maintainable code, ensuring that every feature aligns with the company’s performance and reliability standards. By collaborating closely with product managers, designers, and backend engineers, you will shape the user experience, implement new functionalities, and refine existing workflows. Your leadership will also involve mentoring junior developers and setting coding best practices across the mobile team.
The technical environment at z.systems is built around modern, open‑source tools that promote rapid iteration and continuous delivery. You will work extensively with React Native, leveraging TypeScript for type safety and maintainability. Expo and EAS Build will be your primary tools for managing builds, OTA updates, and environment configurations. Native modules will be developed in Java/Kotlin for Android and Swift/Objective‑C for iOS to bridge platform‑specific capabilities. You will also integrate with REST and GraphQL APIs, ensuring secure and efficient data exchange between the mobile layer and the backend services. Familiarity with CI/CD pipelines, automated testing, and performance profiling will be essential to keep the app stable across a wide range of devices.
Cross‑platform development is a core competency for this role. You will be responsible for delivering a consistent user experience on both Android and iOS devices, taking into account platform‑specific design guidelines and performance nuances. This includes optimizing rendering pipelines, managing memory usage, and ensuring smooth animations even on lower‑end hardware. You will also handle device fragmentation by testing across multiple OS versions and screen densities, using tools such as Android Studio and Xcode for debugging and profiling. By maintaining a shared codebase, you will reduce duplication, accelerate feature rollouts, and simplify maintenance, while still providing native performance where necessary.
Performance and reliability are non‑negotiable for a retail‑centric mobile app. You will implement rigorous profiling and monitoring to detect bottlenecks, memory leaks, and slow network calls. Techniques such as lazy loading, code splitting, and efficient state management will be employed to keep the app responsive. You will also set up automated performance tests and integrate them into the CI pipeline, ensuring that regressions are caught early. Additionally, you will work with the backend team to optimize API responses, implement caching strategies, and reduce latency, thereby delivering a seamless experience for both retailers and consumers.
Collaboration is key to success at z.systems. You will work in an agile environment, participating in sprint planning, daily stand‑ups, and retrospectives. Your role will involve close interaction with product owners to clarify requirements, with designers to translate mockups into functional UI components, and with backend engineers to define API contracts and data models. You will also coordinate with the QA team to establish test cases, perform code reviews, and ensure that new features meet quality standards before release. By fostering open communication and knowledge sharing, you will help build a high‑performing, cross‑functional team that delivers value quickly and sustainably.
Deployment and release management will be part of your responsibilities. You will manage the full mobile lifecycle, from code commit to store submission, using CI/CD pipelines that automate build, test, and deployment processes. Expo EAS Build will be used to generate OTA updates, allowing you to push incremental changes without requiring users to download a full app update. You will also handle App Store and Play Store submissions, ensuring compliance with platform guidelines, preparing release notes, and monitoring post‑release metrics. By maintaining a robust release pipeline, you will minimize downtime, reduce the risk of bugs, and accelerate time‑to‑market for new features.
z.systems is experiencing rapid growth, both in terms of user base and geographic reach. As a Senior Mobile Developer, you will play a pivotal role in scaling the mobile platform to support thousands of retailers and millions of consumers across multiple African countries. This growth will involve adding new features, supporting additional languages, and ensuring the app can handle increased traffic and data volume. You will also contribute to architectural decisions that enable horizontal scaling, such as micro‑services integration and cloud‑native deployment. Your work will directly impact the company’s ability to deliver a reliable, high‑performance mobile experience at scale.
The company culture at z.systems values innovation, ownership, and continuous learning. You will be encouraged to experiment with new technologies, propose architectural improvements, and share knowledge through internal workshops. The team operates in a fast‑paced, startup‑like environment, yet benefits from the stability and resources of a VC‑backed organization. Diversity and inclusion are core principles, and the workplace promotes collaboration across disciplines and geographies. By joining z.systems, you will become part of a mission‑driven team that is reshaping retail in Africa, while advancing your own career through challenging projects, mentorship, and exposure to cutting‑edge mobile development practices.
