Senior React Native Mobile Developer

Job Title: Mobile Apps Developer React Native (2 openings) — Advanced to Fluent English required 100% RemoteRole DescriptionWe 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 ResponsibilitiesDesign 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.QualificationsBachelor'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 RequiredRole Description 100% RemoteWe 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 ResponsibilitiesDesign, 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 SkillsFluency 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.QualificationsBachelor'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