Hello Sir,
Greetings from Sapphire!
We have gone through the job post and saw attached youtube link in which we understood all the features and flow of the project. You are currently facing issues and wanted to be fixed Youtube, eBay, and Amazon. But, before this, we need to understand the code first after that we can help you with the project.
We do have development & UI/UX teams for this who are proficient in Objective-C, All Versions of swift, Android Studio, Java, etc. And skilled in this. They are knowledgeable and have more than 5+ years of hands-on experience in mobile application development. Share Requirement specification document with us and Let's Start working together with the Project. The Given Estimation is for Knowledge only, Actual May Vary after the Final Requirement Analysis Phase. Here is a short overview of us just take a look.
We are working in this field for 17 years and having satisfied Customers 1470+. Also, we are an ISO certified Development center specializes in Mobile Applications since 2010 as well as Desktop and Web Softwares. We have Products which is Popular in Market and top MNC Companies are currently using it Also, Providing Services for Mobile, Desktop, And Web too.
Looking for your positive response,
Team Sapphire Software Solutions.