Audit Mobile App ReactNative Code

My team and I are looking to have the ReactNative code used in a Android, IOS mobile app audited. We are looking for an independent expert for detailed analysis of the usability, of the code, providing us with insight into whether our mobile app is working effectively for its intended purpose. The full app code will need to be audited, ensuring not only the backend and frontend components are accurately functioning together, but also that the overall user experience is of a satisfactory level.

We would like the analysis provided with the audit to be of a detailed level. It would be beneficial to us if the audit provides us with feedback on which areas need to be improved, as well as what changes could be made to increase the usability of the code. Our aim is to obtain an understanding of the effectiveness of the code so that we can ensure our mobile app is of the highest quality and offers the best user experience from customer lens.