React Native Developer

Project for international client from the heating, ventilation, and air conditioning (HVAC) technology industry. The project involves the development of a cross-platform mobile application (iOS + Android) using React Native for end users, which integrates with the company’s IoT devices.

Location: Readiness to work in a hybrid work model (once a week at the client's office in Katowice).

Our expectations

• Minimum 4 years of experience in React Native and 5+ years in general frontend development (JavaScript/TypeScript, HTML, CSS).

• Strong knowledge of React Native, including best practices for developing cross-platform mobile applications (iOS + Android).

• Experience in integrating mobile applications with IoT devices, including:

  • reading device parameters (temperature, operating modes, energy consumption, historical data),

  • controlling the device from within the app (schedules, on/off, operating mode settings),

  • data synchronization with a cloud backend, handling push notifications.

• Ability to work with backends, microservices, and IoT platforms, including implementation of business logic and network communication.

• Experience with multi-brand and multi-language applications, scalable across different markets.

• Knowledge of mobile and integration testing, test automation, and CI/CD processes (e.g., Bitrise, GitHub Actions, Fastlane).

• Familiarity with tools for monitoring and debugging mobile applications.

• Ability to ensure application and communication security, including user authentication, data encryption, and protection of communication channels between the app, device, and cloud.

• Application performance optimization, including startup time, bundle size, responsiveness, offline mode handling, and connectivity issue management.

• Fluent English (B2).

Welcome Skills

• Proficiency in TypeScript, Redux / MobX, React Navigation, and GraphQL.

• Experience working with highly scalable applications and integrating them with cloud platforms.

• Knowledge of UX/UI principles in the context of mobile applications.

• Experience in migrating existing applications to React Native or modernizing the technology stack.

• Understanding of mobile and IoT application security standards.

Key tasks

• Design, development, and maintenance of mobile applications using React Native for iOS and Android platforms.

• Implementation of new features and optimization of existing solutions in terms of performance, security, and scalability.

• Integration of mobile applications with IoT devices.

• Participation in projects focused on developing multi-brand and multi-language applications for various markets.

• Creation and maintenance of unit and integration tests, as well as automation of deployment processes in a CI/CD environment.

• Monitoring, analysis, and debugging of application performance using appropriate tools.

• Ensuring a high level of application security – user authentication, data encryption, and protection of communication channels.

• Optimization of application performance regarding startup time, bundle size, responsiveness, offline mode support, and connectivity handling.