# Senior Mobile DeveloperWarsaw, PolandRemoteplvia direct// Job TypeFull Time// SalaryNot disclosed// Posted1 day ago// Work Moderemote## About the RoleQuick Facts B2B rate: 150-170 PLN netto + VAT/h Work mode: Remote (possible delegations to Finland) Team: 3 developers + UX Designer Project: Development of a mobile application for iOS and Android Description You will work on the development and maintenance of a mobile app for iOS and Android. The role includes building new features in React Native, improving architecture and solution quality, integrating with backend and external services, and ensuring testing, CI/CD, and publishing. You will also focus on security, accessibility, and observability while using AI tools in everyday development. Responsibilities Development and maintenance of the mobile application for iOS and Android Creation of new features in React Native Work on architecture and solution quality Integrations with the backend and external services Testing, CI/CD, and publishing of applications Ensuring security, accessibility, and observability Using AI tools in daily development Requirements Very good experience with React Native and TypeScript Experience with Android and iOS and Xcode Knowledge of Redux, Firebase, Jest, and CI/CD Experience with App Store Connect and Google Play Console Independence and experience making architectural decisions Knowledge of security, accessibility, and production operations Nice to have Knowledge of Node.js, NestJS, Express, REST API, OAuth, JWT, SQL, NoSQL, AWS, Docker, Kubernetes Experience with application architecture, observability, security, and accessibility Knowledge of AI tools supporting development, e.g., GitHub Copilot and Claude Code Benefits Long-term stable employment under a B2B contract Opportunity for growth within a large structure, direct contact with the team manager Work in an IT-mature global organization with agile methodologies respected Co-financing for MultiSport card and insurance Working hours start: 7:30–9:30 Recruitment process: two online interviews