Mid Mobile Developer – React Native/Expo
BucharestHybridFull-time
AI Summary
Design, develop, test, and maintain cross-platform mobile applications using React Native and Expo, integrating with REST APIs and native device features.
About this role
About Qualysoft
·25 years of experience in software engineering, established in Vienna, Austria
·Active in Romania since 2007, with office in central Bucharest (Bd. Iancu de Hunedoara 54B)
·Delivering End to End IT Consulting Services - From Team Augmentation and Dedicated Teams to Custom Software Development
·We deliver scalable enterprise systems, intelligent automation frameworks, and digital transformation platforms
·Cross-industry experience by sustaining global players in BSFI (Banking, financial services and insurance), Telecom,Retail & E-commerce, Energy and Utilities, Automotive, Manufacturing, Logitics, High Tech
·Global Presence: Switzerland, Germany, Austria, Sweden, Hungary, Slovakia, Serbia, Romania, and Indonesia
·International team of 500+ software engineers
·Strategic partnerships: Microsoft Cloud Certified Partner, Tricentis Solutions Partner in Test Automation and Test Management, Creatio Exclusive Partner, Doxee Implementation Partner
·Powered by cutting-edge technologies: AI, Data & Analytics, Cloud, DevOps, IoT, and Test Automation.
·Project beneficiaries ranging from large-scale enterprises to startups
·Stable growth and revenue increase year over year, a resilient organisation in volatile IT market conditions
·Quality-first mindset, culture of innovation, and long-term client partnerships
·Global and local reach – trusted by key industry players in Europe and the US
Responsibilities
Design, develop, test, and maintain cross-platform mobile applications using React Native and Expo.
• Build reusable, maintainable, and responsive mobile UI components.
• Integrate mobile applications with REST APIs and backend services.
• Implement authentication, authorization, secure data storage, and session management.
• Develop features using native mobile capabilities such as GPS/location, camera, notifications, background tasks, and device storage when required.
• Handle application state, networking, caching, offline scenarios, and synchronization.
• Optimize application performance, stability, startup time, and resource usage.
• Troubleshoot and resolve application defects, crashes, API integration issues, and platform-specific behavior.
• Write and maintain unit, integration, and UI tests.
• Participate in code reviews and contribute to improving mobile architecture, coding standards, and development practices.
• Support application builds, releases, and deployment to Apple App Store and Google Play.
• Collaborate with Product, QA, Backend, and DevOps teams throughout development, testing, release, and production support.
• Use GitHub Copilot and other approved AI-assisted development tools to improve coding, testing, refactoring, and development productivity while ensuring code quality and correctness.
Qualifications
• At least 3 years of professional software development experience.
• Strong hands-on experience with React Native.
• Practical experience using Expo and the Expo ecosystem.
• Strong knowledge of JavaScript and TypeScript.
• Good understanding of React concepts, component architecture, hooks, state management, and reusable UI design.
• Experience developing and consuming REST APIs.
• Experience with mobile navigation, application state management, local storage, and asynchronous data handling.
• Understanding of iOS and Android platform differences and mobile application lifecycle.
• Experience with Git and collaborative development workflows.
• Experience with debugging, profiling, testing, and troubleshooting mobile applications.
• Understanding of mobile security concepts, authentication, authorization, and secure storage.
• Experience using GitHub Copilot or similar AI-assisted development tools.
• Ability to analyze requirements and independently deliver moderately complex mobile features.
• Good communication, collaboration, and documentation skills.
Skills
AndroidAuthenticationAuthorizationDebuggingExpoGitGitHub CopilotIntegration TestingIOSJavaScriptMobile SecurityProfilingReact NativeREST APISecure StorageTypeScriptUI TestingUnit Testing
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