Add AI Chat Feature to Existing React Native App

We need a developer to integrate an AI chat feature into an existing React Native app. The work includes connecting the chat interface to the backend, implementing message sending and receiving, and ensuring the feature works smoothly across both iOS and Android. You should be comfortable working within an existing codebase, troubleshooting issues, and delivering a reliable user experience. This is a part-time project expected to last 1 to 3 months, with a strong preference for someone who can start quickly and communicate clearly throughout the project.