Sr Mobile App Developer - Android & React Native

Mobcast Innovations; Mumbai; On-site; INR 1,800,000 - 2,400,000; Full time

Job summary

Mobcast Innovations is seeking a Senior Mobile Application Developer with 5+ years of hands-on experience in Android and React Native. You will design, develop, and maintain scalable mobile apps, collaborating with product, UI/UX, backend, QA and DevOps to deliver enterprise-quality solutions.

Proficiency in Kotlin/Java, React Native, REST APIs, and secure data handling is essential. You will work across the full lifecycle from development to deployment, debugging production issues, and

Qualifications

• 5+ years of professional Android development experience.
• Strong experience with Kotlin and/or Java.
• Good understanding of Android lifecycle, UI, and architecture components.
• Experience with React Native and JavaScript/TypeScript.

Responsibilities

• Design, develop, maintain Android and React Native apps.
• Build scalable, high-performance mobile applications for enterprise and consumer use cases.
• Integrate apps with REST APIs, authentication, and backend platforms.
• Publish and manage apps through Google Play Console and enterprise distribution mechanisms.
• Debug production issues and participate in code reviews and CI/CD pipelines.

Skills

Android development

Kotlin/Java

React Native

JavaScript/TypeScript

REST API integration

Security best practices

Debugging/problem solving

Tools

Git

Android Studio

CI/CD

Firebase

Job description

Role Expectations

We are looking for an experienced Senior Mobile Application Developer with 5+ years of hands-on experience in Android and React Native development.

The ideal candidate should be strong in building scalable, secure, and high-performance mobile applications, with experience taking applications from development through deployment and production support.

You will work closely with product managers, UI/UX designers, backend engineers, QA, and DevOps teams to deliver enterprise-grade mobile applications.

Key Responsibilities

• Design, develop, maintain, and enhance Android and React Native applications.
• Build scalable and high-performance mobile applications for enterprise and consumer use cases.
• Develop reusable components and maintain clean, modular, and maintainable code.
• Integrate mobile applications with REST APIs, authentication systems, third-party services, and backend platforms.
• Work with native Android capabilities and integrate native modules with React Native where required.
• Implement secure authentication, authorization, local storage, encryption, and secure API communication.
• Integrate and troubleshoot Firebase services, FCM push notifications, deep linking, analytics, and crash reporting.
• Handle application lifecycle, background processing, offline capabilities, caching, and synchronization.
• Optimize applications for performance, memory usage, battery consumption, and network efficiency.
• Work with Android SDK, Kotlin/Java, and modern Android development practices.
• Develop React Native applications using modern JavaScript/TypeScript practices.
• Debug and resolve production issues across different Android devices and OS versions.
• Participate in code reviews and maintain engineering standards.
• Write unit tests and contribute to automated testing wherever applicable.
• Work with Git-based development workflows and CI/CD pipelines.
• Collaborate with QA teams for functional, regression, performance, andrelease testing.
• Publish and manage applications through Google Play Console and relevant enterprise distribution mechanisms.
• Troubleshoot production incidents and provide timely fixes.
• Contribute to technical design discussions and architectural decisions.

Required Skills

Android:

• 5+ years of professional Android development experience.
• Strong experience with Kotlin and/or Java.
• Good understanding of Android SDK, Android lifecycle, activities, fragments, services, broadcasts, and background processing.
• Experience with Android UI development and responsive layouts.
• Strong understanding of REST API integration and JSON.
• Experience with local databases/storage such as Room, SQLite, Shared Preferences/DataStore, or equivalent.
• Experience with Android security best practices.
• Understanding of application performance optimization and memory management.
• Experie nce with Android debugging, profiling, crash analysis, and production issue resolution.

React Native:

• Strong hands-on experience with React Native application development.
• Strong knowledge of JavaScript/TypeScript and React.
• Experience with React Native navigation, state management, API integration, and reusable components.
• Experience integrating native Android modules/features into React Native.
• Understanding of React Native build and release processes.
• Experience debugging React Native applications across different devices and OS versions.
• Knowledge of performance optimization in React Native applications.

API & Integration

• Strong understanding of REST APIs and API integration patterns.
• Experience with authentication mechanisms such as JWT, OAuth2, SSO, or similar.
• Experience working with JSON-based APIs.
• Understanding of API error handling, retries, timeouts, caching, and offline scenarios.
• Experience integrating third-party SDKs and services.

Development & Engineering Practices

• Strong knowledge of Git and Git workflows.
• Experience working in Agile/Scrum development environments.
• Good understanding of software development lifecycle and release management.
• Ability to write clean, maintainable, and testable code.
• Strong debugging and problem-solving skills.
• Experience working with CI/CD pipelines is preferred.

Good to Have

• Experience with Node.js / Express.js or similar backend technologies.
• Understanding of backend API development.
• Experience working with MongoDB, MySQL, or PostgreSQL.
• Experience with AWS or other cloud platforms.
• Experience with Docker and CI/CD.
• Experience with Firebase services such as FCM, Crashlytics, Analytics, Remote Config, etc.
• Experience with iOS / Swift / Objective-C is an advantage.
• Experience with mobile application security, SSL pinning, encryption, secure storage, and VAPT remediation.
• Experience with enterprise applications and large-scale deployments.
• Experience integrating SSO/SAML or enterprise identity providers.
• Experience working with offline-first mobile applications.

Technology Stack

Primary: Android, Kotlin, Java, React Native, React, JavaScript/TypeScript

Backend: REST APIs, Node.js Good to Have

Database: MySQL / MongoDB / PostgreSQL Good to Have

Tools: Git, Android Studio, VS Code, CI/CD

Services: Firebase, FCM, Crashlytics, Analytics

Notice period :

Immediate Joining preferred