React Programmer for E-commerce Service Enhancement

We are an e-commerce company and use a management software to optimize customer service. Our software is developed in React and needs bug fixes and new features. We are looking for an experienced developer who can help us improve it.
The main features of the management system:
- Multichannel Chat: Allows operators to communicate with customers through different channel.
- Customer Management: View and edit customers' personal data, with history of transactions.
- Orders and Quotes: Creation and management of quotes and orders, with cost preview and manual editing capability.

Attached to the post is documentation with the changes we need


Requirements
- Punctuality in delivery
- Good communication
- Participation in the project by proposing solutions or new ideas

Main Technical Requirements
- Excellent knowledge of HTML, CSS, and JavaScript
- Experience with React
- Experience with the MUI Material library