Hello,
I am exactly the man whom you are looking for!
I am an expert on this. My portfolio includes projects for large companies, e.g. Time Inc. (Entertainment Weekly, Southern Living, All You), The Atlantic, Forbes, Vogue. My templates look perfect across wide range of email clients!
Huge experience! I have coded over 300 responsive email templates in the past year and over 1000 in my email coder career. I am able to provide responsive behavior even in Gmail App and even in new Android 5.x and iOS devices where responsive email are not supported out of the box!
No need to prepare mobile view for your designs. I can format it and make mobile friendly myself. I also have a plenty of experience in Mailchimp.
Here are examples of my responsive coding email template jobs: (Please play with browser window width to get look on responsive behavior)
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Need more feel free to ask. I have got lots of it :).
I am using Email on Acid service for quality assurance. Supported platforms are Outlook 2000, ..., 2016; Apple Mail 5, 6, 7, 8; Thunderbird; iOS, Android, Windows Phone devices and web-based clients AOL Mail, Gmail, [login to view URL], Yahoo Mail and more
Thanks & Cheers
Bartosz Talarek