Hello,
I work as a Front End Developer at Gameloft Romania. I am specialized on HTML 5, CSS 3, Javascript / jQuery / Angular JS and I have a 4 years experience in domain.
Regarding your project, I am specialized on Responsive Design, if your app is a web app I also assure cross browser compatibility, my experience helped me to work correctly from the beginning and for older browsers like IE7/8/9 will be needed a very little time to look the same as on newer browsers.
I asked for the first 3 h in advance because I saw you have not verified your payment method.
I am waiting for a response from you!
Regards,
AlexPilica