Unity AR Mobile Developer - Code Integration & Bug Fixes

We need a Unity AR developer to integrate validated POC components into a production-ready mobile app. The application displays 3D models in augmented reality on iOS and Android.

Technical Requirements
Must Have:
3+ years Unity mobile development experience
ARCore and ARKit implementation experience​
Strong C# programming skills

Firebase integration experience (Auth, Firestore, Storage, CloudFunctions)
3D model optimization knowledge
Scope of Work:
1)Code integration and refactoring
2)Firebase feature enhancements
3)Bug fixes and performance optimization
4)Standard AR functionality (plane detection, gestures, placement, custom UI, backend persistence )
5)Production builds for iOS/Android
6)Documentation

MANDATORY APPLICATION REQUIREMENTS:
Please include ALL of the following in your proposal, or it will be automatically rejected:

1) Unity History Question: What was Unity's main announcement regarding blockchain and NFT support in 2023, and what was the community's reaction?
2) Technical Scenario: Describe a specific bug or performance issue you encountered when loading large GLTF models in a Unity AR app, and the exact steps you took to resolve it. (Generic answers like "I optimized the mesh" will not be considered)
3) Code Comment: In your first line of response, write: "Reviewed requirements - timeline realistic" (This confirms you read the full post)
4) Portfolio Evidence: Link to ONE specific AR app you built (not a team project) and explain your exact role in 2-3 sentences maximum.

To Apply, Include:
All four items above (numbered clearly)

Your availability start date

Individual contractors only. No agencies.