Developer for Chat-Based Chrome Add-in

We are looking for a skilled developer to assist us in building a chat-based Chrome extension that will work seamlessly in both Google Chrome and Microsoft Edge. This is a part-time role (15-20 hours per week) over the next few months, with flexibility on working hours.
The ideal candidate will have strong experience with JavaScript and Chrome Extensions APIs. Integration experience with third-party platforms (e.g., Microsoft 365, Teams, or similar) would be a significant advantage.
Those are the first tasks (it is envision a cooperation over multiple projects if this one goes well):
- use a chrome add-in
- chatwindow that integrate with browser seamlessly
- Get text from word processor online (retrieve information from documents in the user's browser)
- setup authentification for chat
- Nice/modern/intuitive chatwindow visuals
Providing links to previous relevant projects, assist us in evaluating demonstrable prior experience in those areas.