Mobile App Developer

1 day ago

Bengaluru, Karnataka, India Hire In Sync Full time

Job Title

Mobile Application Developer – Android & iOS

Job Summary

We are looking for skilled Android and iOS Mobile App Developers to design, develop, and maintain a secure, high-performance real-time messaging application similar to Telegram. The ideal candidate will have strong experience in mobile app development, real-time communication, scalability, and security-focused architectures.

Key ResponsibilitiesMobile App Development

  • Design and develop high-performance Android and iOS applications with real-time messaging capabilities.
  • Build features such as one-to-one chat, group chats, channels, media sharing, voice/video calls, and notifications.
  • Ensure smooth UI/UX with responsiveness and performance optimization.
  • Implement offline support, message sync, and data caching.

Architecture & Integration

  • Integrate apps with backend services, APIs, and real-time sockets (WebSockets, MQTT, or similar).
  • Implement end-to-end encryption and secure data storage.
  • Work with cloud services (Firebase, AWS, GCP) for messaging, storage, and push notifications.
  • Ensure scalability for millions of concurrent users.

Quality & Performance

  • Write clean, maintainable, and testable code.
  • Debug, optimize, and improve application performance and memory usage.
  • Conduct unit testing, integration testing, and app store release management.

Collaboration

  • Participate in code reviews and architectural discussions.
  • Stay updated with the latest mobile development trends and best practices.

Required Skills & QualificationsAndroid

  • Strong experience with Kotlin and/or Java
  • Expertise in Android SDK, Jetpack, MVVM/MVI
  • Experience with push notifications (FCM) and background services
  • Familiarity with Play Store deployment and policies

iOS

  • Strong experience with Swift and/or Objective-C
  • Knowledge of iOS SDK, UIKit, SwiftUI
  • Experience with APNs, background tasks, and iOS app lifecycle
  • Familiarity with App Store submission and review guidelines

Common Skills

  • Experience with real-time messaging apps or chat platforms
  • Strong understanding of REST APIs, WebSockets, and JSON
  • Knowledge of encryption, authentication, and secure communication
  • Experience with Git, CI/CD pipelines
  • Understanding of mobile performance optimization

Preferred Qualifications

  • Experience building apps similar to Telegram, WhatsApp, Signal, or Slack
  • Knowledge of cross-platform frameworks (Flutter / React Native) is a plus
  • Experience with VoIP, WebRTC, or live streaming
  • Familiarity with microservices architecture
  • Experience handling large-scale user bases

What We Offer

  • Opportunity to work on a high-scale, real-time communication platform
  • Flexible work environment
  • Learning and growth opportunities

Job Types: Contractual / Temporary, Freelance

Pay: ₹116, ₹253,490.18 per year

Work Location: In person

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