Hello
I understand that you are looking for a c# developer to improve your application user interface. You want it's UI like the given youtube link application. Also, need to work on the database and generate the activation code for students those who are installing this app first time.
We would like to do this job, please let me know whether my understanding is correct.
Please give me access to your existing online exam application for better understanding.
Please note that we have experience in developing web and desktop practice applications for competitive exams like GRE, GMAT, TOFEL, etc.
We are a team of software developers who work on Microsoft technology stack like C#.NET, ASP.NET, VB.NET, SQL Server, WPF, WCF, SharePoint, MVC etc.
Other skills- HTML5, CSS, JQuery, Bootstrap, JavaScript.
We can schedule a chat or call for further discussion.
Thanks,
Smita