English Fluency Web App Development

I'm looking for an experienced developer to create a web application aimed at improving English fluency through interactive speaking exercises.

The app should include:
- Interactive speaking exercises as the primary function
- Voice recognition and feedback
- Progress tracking and reports
- Game-like activities and challenges

Ideal skills and experience:
- Strong background in web app development
- Experience with voice recognition technology
- Ability to implement engaging, game-like features
- Familiarity with progress tracking systems and user-friendly report generation

Please include any relevant work samples in your bids.