Mobile App Developer (Android, ReactNative)

Synapseindia; Kolkata District; On-site; INR 900,000 - 1,600,000; Full time

Job summary

SynapseIndia is seeking a skilled mobile development professional to design, build, and maintain Android and iOS applications using Android, React Native, and Flutter. You will lead development from requirements to production, integrate REST APIs, Firebase, and third-party SDKs, and ensure secure storage and scalable UI patterns.

The role requires 3+ years of hands-on experience with Android and React Native, proficiency in Kotlin/Java, React Native, and CI/CD practices, plus strong

Qualifications

• 3+ years of experience in mobile application development.
• Strong hands-on experience with Android and React Native.
• Experience with Kotlin/Java, Android SDK, Jetpack, Compose, MVVM, Coroutines, Hilt/Dagger, Room.
• Proficiency in React Native: JavaScript/TypeScript, Redux Toolkit, React Navigation, Native modules for Android/iOS.
• Experience with REST APIs, Firebase, push notifications, authentication, deep linking, and third-party SDKs.
• Experience with Google Maps/location services and local storage.
• Knowledge of mobile security, testing, debugging and performance optimization.
• Experience with Google Play Console, App Store Connect, TestFlight, signing, and production releases.
• Experience with Git/GitHub and CI/CD pipelines.
• Strong problem-solving, communication and collaboration skills.
• Experience working with international clients and distributed teams is an advantage.

Responsibilities

• Develop, maintain, and enhance high-quality mobile applications for Android and iOS.
• Lead mobile development activities from requirements to production support.
• Integrate REST APIs, Firebase, push notifications and third-party SDKs.
• Implement secure storage, deep linking and offline capabilities.
• Ensure scalable UIs with Jetpack Compose, XML, React Native, Flutter.
• Coordinate with backend, QA, UI/UX, PMs, and clients to deliver features.
• Perform testing, troubleshoot crashes, and optimize performance.
• Manage builds and releases (APK/AAB, IPA, signing, CI/CD).
• Provide technical guidance and ensure application quality and performance.

Skills

Android

React Native

Flutter

MVVM

Clean Architecture

REST APIs

Firebase

Push notifications

CI/CD

Team collaboration

Tools

Android Studio

Git/GitHub

Gradle

Xcode

TestFlight

Job description

What is the work?

• Develop, maintain, and enhance high-quality mobile applications for Android and iOS.
• Lead mobile development activities from requirement analysis, design, and development through testing, deployment, and production support.
• Develop applications using Android, React Native, and/or Flutter.
• Design scalable applications using MVVM, Clean Architecture, Repository Pattern, and appropriate state-management approaches.
• Integrate REST APIs, JSON, GraphQL, Firebase, push notifications, payment SDKs, Google Maps, and third-party SDKs.
• Implement authentication, authorization, secure storage, deep linking, offline capabilities, and mobile security.
• Develop responsive and adaptive mobile UI using Jetpack Compose, XML, React Native, Flutter, Material 3, etc.
• Work with local databases/storage such as Room, SQLite, DataStore, Hive/Isar, and Secure Storage.
• Perform unit, UI, widget, and integration testing and troubleshoot crashes, ANRs, memory, and performance issues.
• Manage Android/iOS builds and releases, including APK/AAB, IPA, Gradle, CocoaPods, signing, ProGuard/R8, Google Play Console, App Store Connect, and TestFlight.
• Use Git/GitHub and participate in code reviews, CI/CD, and release management.
• Work closely with Backend Developers, QA, UI/UX, Project Managers, and clients.
• Provide technical guidance, troubleshoot production issues, and ensure application quality and performance.
• Stay updated with mobile technologies, SDK changes, security practices, and platform requirements.

What skills and experience are we looking for?

• 3+ years of experience in mobile application development.
• Strong hands-on experience with Android, React Native.
• Android: Kotlin/Java, Android SDK, Android Studio, Jetpack, Compose, MVVM, Coroutines, Hilt/Dagger, Room, WorkManager.
• React Native: React Native, JavaScript/TypeScript, React Hooks, Redux/Redux Toolkit, React Navigation, Native Modules, Android/iOS integration.
• Strong experience with REST APIs, JSON, Firebase, FCM, push notifications, authentication, deep linking, and third-party integrations.
• Experience with payment SDKs, Google Maps/location services, and local storage.
• Good understanding of mobile security, testing, debugging, and performance optimization.
• Experience with Crashlytics, Android/Flutter/React Native debugging tools.
• Hands-on experience with Google Play Console, App Store Connect, TestFlight, Android/iOS signing, and production releases.
• Experience with Git/GitHub and CI/CD.
• Strong problem-solving, communication, and collaboration skills.
• Experience working with international clients and distributed teams is an advantage.