Full Stack MERN + React Native Expo Codebase Architecture Review & Detailed Report

We are seeking an experienced freelancer to review our full stack MERN and React Native Expo codebase. The task involves analyzing the current architecture and providing a detailed report on best practices, security, and performance improvements. The ideal candidate should have a strong understanding of both MERN and React Native Expo technologies. The project is part-time and expected to last 1 to 3 months.