Professional swift and java programmer required for webview applications ios & Anderoid

I have an application on the web that is ready .. The application is uploaded to Apple and Google Play .. but we need to work for it additions and modifications and improvements that improve the performance of the web view, and we need an expert and specialized person I have a store that works on WordPress, the template itself is also compatible with mobile browsing. The only problem is that if a person enters a product through the application (the application is web based) He cannot go back to his place on the page. Meaning: The person entered on the phone to the store's application (the webview application) on a specific product in the department .. Then he wanted to go back, he could not, there is no written button on it for example, going back We want someone who adds a button inside the products that enables the person to go back to the same section and the same place. We need someone with experience and previous work for the same project idea or who is familiar with the project's specialization. In the event that we find a person and his work is professional, he will be dealt with frequently for some adjustments as well We wish anyone who puts his previous works to the same specialty or who can or has the ability to do this work to communicate with him about the details and look at the project closely .. We want the amendment to be on the iPhone application as well as Android devices. We wish anyone with the best price and set previous work for us for the same WebViwe apps thank you