The Chat AI App marks my debut in mobile development, a project where I prioritized robust security and efficient backend operations. For user authentication, I implemented a JWT (JSON Web Token)-based system, ensuring secure access through password hashing and salting. The backend leverages N8N Workflow API, a powerful no-code automation tool, which streamlines data processing. All user data and chat history are securely stored in MongoDB, a flexible and scalable NoSQL database. For network requests and JSON parsing within the mobile application, I integrated OkHttp and GSON libraries, ensuring efficient and reliable data handling.