Senior Mobile Apps Developer (React Native) and Senior React JS Web 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!