Web React Mobile Application Support Engineer

Web React Mobile Application Support Engineer

Role Summary
We are seeking a Web / Mobile Application Support Engineer with hands-on experience in React.js and React Native to provide L2/L3 support for customer-facing web portals and mobile applications.
The candidate will investigate production issues, troubleshoot frontend and mobile application failures, analyze API interactions and coordinate incident resolution to maintain a reliable digital customer experience.
Key Responsibilities
• Provide production support for React.js web applications and React Native mobile applications.
• Investigate frontend errors, application crashes, UI failures, authentication issues and API integration problems.
• Troubleshoot browser compatibility, mobile device compatibility and application performance issues.
• Analyze JavaScript errors, network requests, browser console logs and mobile application logs.
• Diagnose API response issues and coordinate with Java/backend support engineers.
• Support mobile application deployment and release validation activities.
• Investigate issues related to login, session management, navigation and customer-facing workflows.
• Perform production smoke testing and validate fixes following deployments.
• Coordinate with Track A Web/Mobile development teams for complex defects and permanent fixes.
• Support incident management, RCA documentation and knowledge-base updates.
• Participate in rotational shifts and critical production incident escalations.
Required Technical Skills
• Strong knowledge of JavaScript, TypeScript, React.js and React Native.
• Good understanding of HTML5, CSS3 and frontend application architecture.
• Experience debugging web applications using Chrome Developer Tools or equivalent.
• Experience troubleshooting REST API integrations and JSON responses.
• Knowledge of Android and iOS mobile application behavior.
• Familiarity with React hooks, state management and component-based architecture.
• Understanding of authentication, OAuth2, JWT and session handling.
• Experience using Git and CI/CD workflows.
• Knowledge of application monitoring, crash reporting and error tracking.
Good to Have
• Familiarity with Android Studio and Xcode debugging.
• Knowledge of mobile app release processes and app store deployment.
• Experience in telecom or large-scale consumer digital applications.
Expected Profile
A hands-on frontend/mobile support engineer who can investigate application issues across browsers and mobile devices, distinguish frontend defects from backend failures and support rapid production recovery.