Mobile Application Developer

15 hours ago

Gurgaon, Haryana, India Lula App Full time US$ 80,000 - US$ 1,20,000 per year

About Lula App:

Lula is an innovative real-time communication and entertainment app, bringing users closer through interactive live video calls, engaging streams, and AI-driven experiences. Our mission is to bridge real-time interactions between streamers and followers through a seamless, scalable in-app experience.

Work Mode:
Onsite

Type:
Full-time

What You'll Be Doing

  • Migrate
    the existing backend from Firebase to a
    custom + PostgreSQL/MongoDB
    stack.
  • Replace Firebase Auth with
    custom authentication
    (MSG91 OTP flow) and implement
    role-based access control
    .
  • Implement
    WebSocket-based real-time subscriptions
    for faster and more reliable updates.
  • Replace Firebase Storage with
    AWS S3
    (or S3-compatible storage) for scalable and secure media management.
  • Build
    custom calling functionalities
    (voice/video) using WebRTC or third-party APIs like Agora, Twilio, or
  • Integrate

    for real-time chat, message history, typing indicators, and video calling management.
  • Implement
    deep linking and screen redirection
    from notifications to specific in-app screens.
  • Set up a
    notification system
    for calls, messages, and events, ensuring delivery in
    foreground, background, and killed states
    .
  • Resolve
    app crash issues
    and perform ongoing performance optimization to improve speed and reduce bundle size.
  • Upgrade Android builds to
    API 35+
    and ensure iOS builds meet the latest App Store requirements.
  • Deploy backend services to
    Railway, Render, or Hostinger
    , with proper CI/CD and environment configuration.
  • Manage
    Google Play Store
    and
    Apple App Store
    app submissions, updates, and compliance.
  • Maintain and update the
    admin panel
    for tracking KPIs, call logs, user activity, and performance data.

What We're Looking For

  • Strong proficiency in
    React Native
    for both Android and iOS platforms.
  • Proven experience migrating apps from
    Firebase
    to custom backend architecture in
    + PostgreSQL/MongoDB
    .
  • Solid backend development skills with
    , , WebSocket
    , and
    AWS S3
    .
  • Hands-on experience with
    real-time communication protocols
    (WebRTC, , Agora, or Twilio).
  • Strong understanding of
    push notification systems
    and deep linking in React Native.
  • Experience in
    app performance optimization
    , crash resolution, and SDK management.
  • Familiarity with
    Google Play Console
    and
    Apple App Store Connect
    for publishing and maintaining apps.
  • Strong problem-solving, debugging, and optimization skills.
  • Ability to work collaboratively with designers, backend engineers, and product teams to deliver a seamless user experience.

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