Senior React Native Developer – energy tech project (f/m/x)

Senior • Hybrid

Wroclaw, Poland

We are looking for a React Native Developer to join a project for a global energy‑tech leader. You will help build a mobile application that supports smart energy management in homes and commercial spaces. The role connects mobile development, IoT, and modern analytics features

Your tasks

Develop high‑performance, reusable UI components for mobile apps using React Native
Implement secure and low‑latency communication between mobile devices and HVAC hardware
Build data visualization modules for energy usage, savings, and indoor air quality insights
Collaborate with backend developers to define and consume RESTful APIs hosted on Azure
Diagnose and resolve performance issues in complex, data‑heavy scenarios

Requirements

At least 5 years of experience working with React Native in commercial projects
Strong skills in building mobile UI components and app architecture
Good understanding of secure communication between mobile apps and hardware/IoT systems
Ability to work with API integrations and JSON data handling
Experience optimizing app performance and troubleshooting bottlenecks
Fluency in English
Residing in Poland required

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."

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