Role description
Role: Senior Mobile App Developer (Cross-Platform – iOS & Android
About the Role
We are looking for a technically robust Mobile App Developer to join our team and take ownership of an existing cross-platform application built on the Ionic Framework with React JS. The ideal candidate will have hands-on experience diagnosing and resolving critical production issues — particularly app crashes and performance/slowness problems — across both Android and iOS platforms.
Key Responsibilities
• Debug, troubleshoot, and resolve app crashes, memory leaks, and performance bottlenecks in a live production mobile application.
• Analyze crash logs, stack traces, and performance profiling data (Android Studio Profiler, Xcode Instruments, Firebase Crashlytics, Sentry, etc.) to identify root causes.
• Optimize app startup time, rendering performance, and responsiveness across both Android and iOS.
• Maintain and enhance the existing Ionic + React JS codebase, ensuring consistent behavior across platforms.
• Work with native plugins/bridges (Capacitor/Cordova)
to resolve platform-specific issues.
• Conduct code reviews, refactor problematic modules, and implement best practices for stability and performance.
• Collaborate with QA, backend, and DevOps teams to reproduce, triage, and fix defects.
• Set up or improve monitoring, logging, and crash-reporting mechanisms for ongoing visibility into app health.
• Document root causes and fixes for recurring issues to prevent regression.
Required Skills & Experience
• mobile app development experience with Ionic Framework (Capacitor and/or Cordova).
• Robust proficiency in React JS (hooks, state management, component lifecycle).
• Proven experience building and maintaining cross-platform apps for Android and iOS.
• Solid understanding of native build tools: Xcode, Android Studio, Gradle, CocoaPods.
• Hands-on experience with performance profiling and crash debugging tools (Crashlytics, Sentry, Instruments, A
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