Android GPS Fix: Background Location Issue

I'm in search of an experienced Android app developer to resolve a critical issue with the location tracking functionality in my existing live app. The problem seems to be that the location updates are not occurring when the app is in the background especially with Android version 11.x and above.

Key Responsibilities:
- Investigate the root cause of the issue.
- Implement a fix that ensures the location tracking operates seamlessly in the background.
- Test thoroughly to make sure the fix is effective and does not introduce any new bugs.

The successful freelancer should have:
- Proven experience in Android native app development.
- A strong background in working with location tracking functionality.
- A portfolio showcasing past work, including examples of similar projects where location tracking bugs or issues were resolved.

Please include samples of your past work in your application. I look forward to hearing from you.