Hello,
I'm an iOS app developer and a member of a small team consisting of highly experienced iOS, Android and backend developers. Our team have UI/UX and graphics designing skills too. We develop native mobile and web apps using latest technologies. We have consistently delivered high quality projects within specified time and budget, which has earned us many positive ratings, as you'll see in my profile.
I have gone through the project description and I believe that our skillset would be ideal for your project, however, I'll need a little more detail to give more accurate estimate of time and budget.
I would be happy to set up a convenient time to discuss the project that you're moving and some ideas about the safest way to get it into the cloud.
Regards,
Sam