Bolt.new Web App Development Expert

I am seeking an expert developer in Bolt.new to enhance and complete my large web application project. The ideal candidate will have:

- Extensive experience with Bolt.new
- Strong skills in user interface design
- Expertise in backend integration
- Proven track record in performance optimization

Key areas of focus include:
- Improving user interface
- Enhancing backend integration
- Optimizing performance

Additionally, I need to add or improve the following functionalities:
- User authentication
- Data visualization
- Payment processing
- Dashboards

Please provide examples of similar work done and any relevant credentials. Looking forward to your bids!