URGENT: Native Android (Java) Developer – Bug Fix & Long-Term Support

Filled
February 23, 2026
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Job Description

Job Overview

We are seeking an experienced Native Android (Java) developer to fix critical bugs in our existing Taxi App and potentially join as a long-term maintenance partner. This is a test project: successful completion can lead to ongoing monthly support and feature updates.

The app is native Java (not Flutter), with a backend built in PHP Core and Node.js (SocketCluster.io) for real-time tracking. The recent update to Android 15 (API 35) introduced bugs due to strict permission and system changes, which need immediate resolution.

Immediate Bugs to Fix

  • Firebase Chat: Messages fail to deliver or sync in real-time (likely background restrictions).
  • Sinch Voice Calls: In-app calls fail or crash (likely Foreground Service permission issues).
  • Android 15 Compliance: Ensure 16KB page alignment and compatibility with Play Store requirements.

Key Responsibilities

  • Diagnose and debug legacy Java Android app issues for Android 15 compatibility.
  • Fix Firebase chat messaging to work reliably in the background.
  • Resolve Sinch voice call issues and ensure stable in-app calls.
  • Ensure full Android 15 compliance, including Play Store requirements.
  • Deliver a production-ready APK/AAB with working chat and calls.
  • Provide recommendations for long-term app stability and maintenance.

Required Skills

  • Expert in Native Android development using Java.
  • Deep understanding of Android 14/15 Background & Foreground Service permissions.
  • Experience with real-time communication integrations (SocketCluster.io, Socket.io, Firebase).
  • Strong debugging and problem-solving skills for legacy apps.
  • Experience delivering production-ready Android builds compliant with Google Play Store standards.

Preferred Qualifications

  • Experience with Sinch SDK or similar voice/video call frameworks.
  • Familiarity with long-term maintenance and support of legacy Android apps.
  • Knowledge of performance optimization and crash prevention for real-time mobile apps.
  • Understanding of backend interactions with PHP Core + Node.js services.

Why Join

Collaborate with a team that values proactive developers who can deliver results.

Immediate short-term project with urgent bug fixes.

Potential for long-term partnership for ongoing maintenance and support.

Work on a production-ready taxi app impacting real users.