E-commerce App Testing and Review

I have a fully completed custom e-commerce web application built with:

- Frontend: React 19 and Tailwind
- Backend: FastAPI
- Database: MongoDB

I need a freelancer to perform thorough testing and review before launch.

Testing Requirements:
- Unit Testing: Ensure individual components work as intended.
- Integration Testing: Verify interactions between frontend, backend, and database.
- UI/UX Testing: Assess user interface and experience for any improvements.

Ideal Skills:
- Strong knowledge of React, FastAPI, and MongoDB.
- Experience with unit, integration, and UI/UX testing.
- Detail-oriented and able to provide a comprehensive feedback report.

Please provide examples of similar work done.