React Native Developer

Britenet; Katowice; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

A leading technology company is seeking a Mobile Application Developer with strong React Native skills to develop and maintain applications for both iOS and Android. The role involves integrating with IoT devices, ensuring application security, and optimizing performance. Flexible working hours and opportunities for professional growth are offered, making it a great place to advance your career in technology.

Benefits

Team-building events

Flexible working hours

Support for professional development

Relaxation areas in offices

Qualifications

• Strong knowledge of React Native for cross-platform development.
• Experience integrating mobile apps with IoT devices.
• Ability to enhance application security and performance.

Responsibilities

• Design, develop, and maintain mobile applications using React Native.
• Implement new features and optimize existing solutions.
• Integrate with IoT devices and manage security.
• Monitor and debug application performance.

Skills

React Native knowledge

Integration with IoT devices

Backend and microservices

Mobile and integration testing

Application performance optimization

Tools

Bitrise

GitHub Actions

Fastlane

Job description

• 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.

Nice to have

• 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.

Main responsibilities

• 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.

A good and friendly atmosphere in the company and the satisfaction of working with both departmental colleagues and direct superiors.

Team-building events

Large internal technology conferences, star parties and team outings.

Flexibility

Working hours are flexible and tailored to individual preferences. As is the mode of work delivery: remotely or in a hybrid model.

They are clear, straightforward and certainly not bumpy. Choose between a managerial or expert development path.

Certifications

We facilitate the development of desired competencies, subsidize training and courses.

Security

We have many years of experience in the market and implement national and international projects. We skillfully manage tasks and enable smooth allocation between projects.

For those who speak fluently and want to maintain this level or wish to develop their language skills, we enable free participation in language lessons. Are conducted in the modern and safe form of online meetings. Just learn IT!

Comfort at work

Attractively decorated relaxation areas, available in the company's largest branches, to encourage relaxation during the day, and equipped kitchens with aromatic coffee.

Support for activity

We have soccer teams, we play championships, we have marathon runners and other active sports lovers on board. We support all passions.

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• Poland
  • Białystok
  • Bydgoszcz
  • Gdańsk
  • Gorzów Wielkopolski
  • Katowice
  • Kielce
  • Kraków
  • Lublin
  • Łódź
  • Olsztyn
  • Opole
  • Poznań