Fullstack Developer with React

Join Sii as a Fullstack Developer and participate in the development of an engineering portal - a key web platform supporting the daily work of all technical teams in a large US-based technology organization.The portal we support integrates with Kubernetes-based infrastructure and Continuous Deployment (CI/CD) systems, enabling tools for transparency, automation and operational efficiency.The project is implemented in partnership with an engineering team that provides cutting-edge solutions in the areas of cloud storage, file synchronization and team collaboration. The platform is used by millions of users around the world, and the development of internal tools has a direct impact on the quality and reliability of the entire technology ecosystem. Your tasks Design and development of modern user interfaces using React and TypeScriptBackend integration - co-creating APIs and designing intuitive workflows for engineering teamsWorking with frontend architecture, state management, performance optimization, component development, UI scalabilityProactive approach to UX/UI - simplifying complex technical processesRequirementsAt least 5 years of experience as a Frontend DeveloperVery good knowledge of React and TypeScriptGood knowledge of Python or GolangExperience working with component architecture and application state managementWillingness to learn and work with backend systemsUnderstanding of UX/UI principles and attention to usability of interfacesAbility to design and integrate RESTful APIsSelf-motivation and initiativeResidence in Poland required and fluency in the Polish languageJob no. 251024-7UUWABenefits For YouGreat Place to WorkSolid financial situationContracts with the biggest brandsCentre of internal trainingsMany experts you can learn fromOpen and accessible management teamProfit sharingPassion Sponsorship programRegular integration events and tripsComfortable and well-equipped officesMySii appMedical care