Senior React Native Engineer

We are a technology company that started its journey in 2008. Our main headquarters is located in the picturesque city of Poznań, nestled by the beautiful Malta lake. For more than 17 years, we have been assisting companies in developing and implementing innovative fintech solutions. Leveraging our expertise in areas such as blockchain, online payments, and more, our clients can invent and develop cutting-edge solutions and services that keep them at the forefront of innovation.Senior React Native EngineerSKILLS: React Native | TypeScript | Redux/Zustand| rest APIs | CI/CD | Mobile ArchitectureB2B PLN 150 - 180 / HourLOCATION: REMOTE, POLANDSTART DATE: ASAPKey Services and Requirements: A Roadmap to Your Professional Success 🚀About the opportunity:Our client, a leading digital asset bank, is starting a greenfield initiative to build their first mobile application from scratch. As a Senior React Native Engineer, you will join at the foundational stage and work closely with the Mobile Tech Lead to design and develop a full-feature mobile banking platform aligned with the existing web experience. This is a unique opportunity to influence the mobile architecture and key technical decisions from day one.Scope of services:Designing and developing a greenfield mobile application using React Native from the ground upEstablishing architecture, patterns, standards, and best practices for the mobile codebaseImplementing end-to-end feature parity with the existing web platformMaking independent architectural decisions (state management, navigation, offline capabilities, security, performance) with clear trade-off analysisProactively identifying technical challenges and proposing multiple solution approachesIntegrating RESTful APIs and collaborating closely with backend teamsWorking directly with the Mobile Tech Lead to design robust, mobile-first solutionsOptimizing performance and ensuring stability across iOS and Android platformsLeveraging AI-powered development tools to accelerate delivery and maintain high code qualityParticipating in code reviews, ensuring maintainability, scalability, and clean architectureSupporting production releases and resolving issues when neededWorking in a fast-paced, greenfield environment with a strong focus on ownership and accountabilityMaintaining transparent and effective communication within the team and with stakeholdersHere’s a set of skills we require:Strong hands-on experience with React Native and production-grade mobile applications (iOS & Android)Senior-level understanding of mobile architecture, React Native internals, lifecycle, and performance optimizationPractical experience in building financial or banking applications (mandatory)Solid understanding of banking workflows, security requirements, compliance considerations, and financial UX patternsFamiliarity with crypto / digital assets and blockchain concepts is a strong advantageStrong knowledge of TypeScriptExperience with state management solutions (Redux, MobX, Zustand, or similar)Ability to evaluate technical approaches, clearly articulate trade-offs, and justify architectural decisions with real examplesExperience integrating RESTful APIs and working closely with backend teamsPractical experience with CI/CD pipelines for mobile applicationsExperience shipping apps to App Store and Google PlayFamiliarity with AI coding tools (Cursor, GitHub Copilot, Claude Code, or similar) and ability to effectively use them in development workflowsStrong solution-oriented mindset and proactive approach to problem-solvingComfort working in ambiguous, greenfield environments with high ownership expectationsExcellent communication skills and ability to work in an international teamEnglish at C1 level or higher (daily communication)Nice to have experience with:Native mobile development (Swift / Objective-C and/or Kotlin / Java)Mobile security best practices, including encryption and biometric authenticationMobile analytics, monitoring, and crash reporting toolsExperience mentoring or supporting other engineers (code reviews, feedback, knowledge sharing)