Senior React Native Mobile Developer

**Job Title: Mobile Apps Developer React Native *(2 openings)* — Advanced to Fluent English required 100% Remote** **Role Description** We are seeking a highly experienced **Mobile Apps Developer** with **10\+ years of professional experience** , with **React Native as the core and mandatory technology** . You will lead the development of scalable, high\-performance mobile applications and collaborate closely with product managers, designers, and backend engineers to deliver seamless mobile experiences across iOS and Android platforms. **Key Responsibilities** * Design and develop cross\-platform mobile applications **using React Native (mandatory)** . * Optimize, maintain, and refactor React Native codebases for performance and scalability. * Integrate **RESTful APIs** , **GraphQL** , **gRPC** , **Firebase** , and third\-party libraries/services. * Develop offline\-first capabilities and ensure efficient local data persistence. * Apply coding best practices, enforce code quality and testing strategies. * Collaborate closely with UI/UX teams to convert design prototypes into polished, responsive interfaces. * Stay up to date with evolving React Native ecosystem trends, libraries, and tooling. **Required Technical Skills (Mandatory)** * **Fluency in English** (spoken and written) for communication with international teams. * **10\+ years of professional experience** in **mobile application development** . * **10\+ years of hands\-on experience developing mobile applications with React Native** . * Strong understanding of React Native architecture, state management (Redux, Context, Recoil, etc.), navigation, and modular component patterns. * Deep knowledge of app **performance optimization** , **memory management** , and **debugging techniques** for mobile apps. * Experience with **Firebase** (analytics, crash reporting, app distribution). * Solid knowledge of **App Store** and **Play Store** publishing workflows. * Experience with **CI/CD pipelines** for mobile applications. * Strong proficiency with **Git** and collaborative development workflows. * Solid understanding of **mobile security practices** , including encryption and secure data storage. **Desired / Nice\-to\-Have (Not Mandatory)** * Experience with **Flutter** development. * Experience with **native iOS development (Swift/Objective\-C)** . * Experience with **native Android development (Kotlin/Java)** . * Prior experience implementing **native modules** for React Native. **Qualifications** * Bachelor’s degree in Computer Science, Engineering, or equivalent experience. * Strong analytical thinking, ownership, and problem\-solving abilities. * Excellent communication skills and proven collaboration across cross\-functional teams. * Ability to work independently or in distributed/remote environments. **Job Title: Senior React JS Web Developer — *Advanced to Fluent English Required*** **Role Description 100% Remote** We are seeking a highly experienced **Senior React JS Web Developer** with **10\+ years of professional experience** in modern web development. You will be responsible for designing, building, optimizing, and maintaining scalable and high\-performance web applications. This role involves close collaboration with product managers, designers, and backend engineers to deliver seamless, intuitive, and visually engaging user experiences. **Key Responsibilities** * Design, develop, and maintain **web applications** using **React.js** . * Optimize codebases for performance, scalability, and maintainability. * Integrate **RESTful APIs** , **gRPC** , **GraphQL** , **Firebase** , and third\-party services. * Implement solutions for efficient state management (Redux, Context API, etc.). * Collaborate closely with UI/UX teams to convert design mockups into clean, responsive, accessible interfaces. * Apply best practices in testing, code review, and performance optimization. * Stay up to date with the latest patterns and evolutions in the React and frontend ecosystem. **Required Technical Skills** * **Fluency in English** (spoken and written) for collaboration with international teams. * **10\+ years of professional experience** in **web application development** . * **10\+ years of hands\-on experience** with **React.js** . * Strong mastery of React architecture, Hooks, Context API, and reusable component patterns. * Deep knowledge of **frontend performance optimization** , **debugging** , and **memory management** . * Strong understanding of **JavaScript (ES6\+)** , **TypeScript** , **HTML5** , **CSS3** , and responsive design. * Experience with **CI/CD pipelines** , version control workflows (Git), pull requests, branching strategies, etc. * Solid understanding of **web security practices** (encryption, secure storage, auth flows, etc.). **Differential (Not Mandatory)** * Experience with **React Native** and/or mobile development (Android/iOS). * Familiarity with **native mobile development** (Kotlin/Java or Swift/Objective\-C). * Experience with App Store / Play Store publishing pipelines (for hybrid app delivery). * Firebase for analytics and crash monitoring. **Qualifications** * Bachelor’s degree in computer science, engineering, or equivalent experience. * Strong analytical and problem\-solving skills. * Excellent communication and collaboration abilities. * Ability to work both independently and in distributed teams. ✨ *If you are passionate about building elegant and high\-impact web experiences, join us at Kaspper and help shape the future!*