Firebase Firestore Write Permission Fix

I'm seeking an experienced Firebase developer to resolve write permission issues in Firestore for my existing project.

Requirements:
- Troubleshoot and fix Firestore write permission errors
- Ensure proper permissions are set for smooth rollout

Ideal Skills and Experience:
- Expertise in Firebase and Firestore
- Strong understanding of Firebase security rules and permissions
- Experience with debugging Firebase permission issues

Please include any relevant experience in your bid.