Java Developer

Job Title Java Developer – Mobile Engineering (React Native) Description We are seeking a hands-on mobile engineer to build, maintain, secure, and support enterprise-grade mobile applications for iOS and Android using React Native, Expo and TypeScript. This role will translate business and design requirements into high-quality technical solutions, integrate with enterprise services, and support CI/CD and release processes. Strong engineering discipline across code quality, testing, security, performance, accessibility, and production support is essential. Location: Sandton, JHB. Work from office mandatory — 8 hours in office per day. Duration: 6 months with possibility of renewal. All checks must be clear prior to engagement. Responsibilities Develop and maintain cross-platform mobile applications using React Native, Expo and TypeScript. Implement polished UI from Figma, wireframes, and design systems with attention to accessibility and performance. Integrate mobile apps with enterprise RESTful APIs, authentication flows and secure storage mechanisms. Support and maintain CI/CD pipelines in Azure DevOps (YAML), including automated builds, testing, signing and release approvals. Manage monorepo layouts, shared packages and mobile workspace tooling to ensure reliable developer workflows. Implement automated testing, TDD/BDD practices and mobile quality gates to maintain high release quality. Use observability and error reporting tools (Dynatrace, Sentry, Splunk) to monitor and troubleshoot production issues. Manage app signing, distribution and release processes via App Store Connect, TestFlight, Google Play Console and internal distribution channels. Participate in code reviews, maintain Git workflows, and work within Agile/Scrum delivery teams. Employ AI-assisted development tools responsibly to increase productivity while maintaining code quality and engineering judgement. Qualifications Proven experience building and maintaining enterprise iOS and Android applications using React Native and Expo. Strong TypeScript and JavaScript fundamentals with modern React patterns. Practical experience with Azure DevOps CI/CD pipelines, secure secrets management, automated builds and release approvals. Experience with app signing and distribution via App Store Connect, TestFlight and Google Play Console. Solid knowledge of mobile security, performance optimization, acc...