Job Highlights: We are looking for a Mobile App Developer to join our dynamic team in Chennai. The ideal candidate will be responsible for building and maintaining high-performance mobile applications with a focus on secure payment gateway integrations , clean architecture, and scalable design practices. Key Responsibilities: Design, develop, and maintain cross-platform mobile applications using React Native and Android SDK . Collaborate with back-end teams to integrate secure RESTful APIs and payment gateway services . Work with Firebase for authentication, push notifications, and analytics. Manage third-party SDKs and ensure seamless in-app integrations (payment, analytics, notifications, etc.). Optimize applications for maximum performance, scalability, and responsiveness. Troubleshoot, debug, and resolve production issues in a timely manner. Work closely with UI/UX designers to ensure intuitive, responsive, and user-friendly interfaces. Maintain proper documentation, coding standards, and version control practices (Git). Participate in team meetings, code reviews, and agile development processes. Stay current with emerging mobile technologies and contribute to continuous improvement. Required Skills: Hands-on experience in mobile app development using React Native / Android . Strong proficiency in JavaScript (ES6+) , React Native , and mobile app architecture. Good understanding of Android SDK , Java , and Jetpack components . Experience in API integration and real-time data handling . Familiarity with Firebase services and third-party SDKs . Understanding of mobile UI/UX best practices and responsive design . Proficient with Git and collaborative workflows. Familiarity with AppCenter or similar CI/CD deployment tools. Experience integrating payment gateway APIs and handling secure transaction workflows . Strong problem-solving, debugging, and optimization skills. Optional / Good to Have: Knowledge of Zend/Laminas (PHP framework) for backend API integration. Exposure to Flutter for cross-platform mobile development.