Audit technique d'application mobile

I am looking for a senior developer to perform a technical audit of a functional mobile app (MVP validated through user testing).
Mission objectives:
Analyze the code quality and structure (React + TypeScript)
Identify technical improvements
Evaluate risks (performance, scalability, security)
Deliver a clear and structured report
Provide estimates for:
– optimization
– possible refactoring
– preparing for scaling to multiple cities
About the app:
Mobile (complete, clickable prototype)
Developed on Base44 platform, frontend in React, TypeScript, and Tailwind CSS
Backend managed via Base44 (Backend as a Service)
User-tested but not yet optimized for large-scale usage
Access provided:
GitHub repository (read-only)
Functional app demo
List of existing features
Expected deliverables:
Written summary report
Technical priority list
Time and complexity estimation
Recommendations for future architecture
Please provide:
Y...