Thief: https://blockchain.info/address/1UPtbrgBayQabnhGYULi6WC4oPCCMhaRz
Any information about the thief will also be rewarded.
BTC transaction is irreversible, so only the one who have the private key of that address can send back the money to you.
Sorry for you loss. If you really want to test next time, either use test BTC or use a very small amount of BTC. Moreover, before bring it to production, please consult some computer security experts.
The testing system had an admin panel that needs a username and password which I set. In the admin panel you can send and receive bitcoins directly from there using the block chain API. I'm just wondering how on earth they got in. The admin page is secure.