AI Chat Bot & App Functionality Enhancement

I am seeking an experienced developer for a two-part project involving an AI chat bot and an app upgrade. The main goal for this project is to enhance the functionality of our existing app.

Key areas to be improved in the app are:

1. User Interface: I envisage an improved navigation and layout that would make the app more user-friendly and attractive.

2. Performance Optimization: We value our users' time. I'm aiming to streamline the user onboarding process to make their experience faster and more efficient.

3. New Features: While we want to optimize existing features, I'm also interested in adding exciting new ones.

Ideal skills for this project would include:
- Extensive experience in app development
- Knowledge of AI and machine learning for the chat bot
- Proficient in UX/UI design
- Excellent understanding of performance optimization
- Ability to work with feedback and make necessary adjustments

Please provide any relevant examples of your work alongside your bid.