Senior React Native Developer

Sii Poland • Poland
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AI Summary

We are looking for an experienced Senior React Native Developer to join our team. The ideal candidate will have a strong background in mobile application development and React Native. The role involves creating and developing mobile applications, designing and implementing application architecture, and collaborating with the backend team.

Key Highlights
Creation and development of mobile applications in React Native (iOS + Android)
Design and implementation of application architecture
Integration with REST / GraphQL API
Optimizing the application for performance and UX
Conducting code review and technical support for the team
Collaborating with the backend team, UI/UX and Product Owner
Technical Skills Required
JavaScript TypeScript React Native Redux Zustand React Query Native modules and bridges (Android/iOS) CI/CD Testing (e.g. Jest, Detox) Debugging and optimization
Benefits & Perks
Great Place to Work
Solid financial situation
Contracts with the biggest brands
Centre of internal trainings
Many experts you can learn from
Open and accessible management team
Profit sharing
Passion Sponsorship program
Regular integration events and trips
Comfortable and well-equipped offices
Medical care

Job Description


We are a team of technology enthusiasts who create cutting-edge mobile applications with global reach. We work on projects that have a real impact on users - from fintech, to e-commerce, to social media applications.

Due to the growth of our team, we are looking for an experienced Senior React Native Developer who will bring to the project not only technical knowledge, but also initiative, good communication and willingness to mentor younger team members.

Your tasks

  • Creation and development of mobile applications in React Native (iOS + Android)
  • Design and implementation of application architecture
  • Integration with REST / GraphQL API
  • Optimizing the application for performance and UX
  • Conducting code review and technical support for the team
  • Collaborating with the backend team, UI/UX and Product Owner

Requirements

  • Minimum of 4 years of experience in mobile application development, including 3 years of experience with React Native
  • Proficiency in JavaScript / TypeScript
  • Familiarity with Redux / Zustand / React Query or other libraries for state management and API communication
  • Experience with native modules and bridges (Android/iOS)
  • Practical knowledge of CI/CD, testing (e.g. Jest, Detox), debugging and optimization
  • Communicative knowledge of English
  • Fluent knowledge of Polish language required
  • Residence in Poland required

Nice to have

  • Knowledge of native technologies (Java/Kotlin, Swift/Obj-C)
  • Experience with publishing applications to Google Play / App Store
  • Previous work with tools like Firebase, App Center, Sentry
  • Ability to provide technical mentoring and participate in recruitments

Job no. 251107-0FLO3

Benefits For You

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

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