Senior React Native Developer – IoT industry (f/m/x)

Sii is a leading provider of technology consulting, digital transformation, and engineering and business services in Poland. The company employs over 7,300 specialists and delivers projects across various industries for clients worldwide. Sii has received the Great Place to Work title 11 times in a row, demonstrating a friendly work environment.

• 4 years of experience in React Native
• Minimum 5 years of experience in JavaScript/TypeScript programming
• Knowledge of Redux, Context API, TanStack Query
• Experience working with RESTful API and IoT device integrations
• Ability to implement complex animations and custom interfaces
• Experience publishing applications on Google Play and App Store
• Previous work in cross-functional teams
• Communicative English (minimum B2)
• Availability to work hybrid with 1 day per week in the Katowice office
• Residency in Poland and fluent Polish language

Nice to have:

• Previous experience with IoT projects or hardware device communication
• Ability to implement complex animations and custom UI
• Experience in cross-functional teams (product, design, QA)

• Develop and maintain a mobile application in React Native
• Implement logic integrating the application with IoT devices via REST API and Wi-Fi hotspot
• Implement custom UI designs and animations according to the design system
• Manage application state using Redux, Context API, and TanStack Query
• Collaborate with the product team
• Participate in code reviews and sprint planning

Employment requires residency in Poland and fluent knowledge of Polish language. Work is hybrid with 1 day per week in the Katowice office.