A fledgling mortgage bank is expanding from its base in North Carolina with an eye on using technology to build a national platform for delivering Alt A and subprime mortgages. “Our motto is three words, ‘prompt, simple, and friendly,” said Charles “Brad” Bradley of Senderra Funding. Headquartered in Charlotte, the wholesaler is currently offering loans in 10 states, including Florida, Indiana, Maryland, Michigan, Minnesota and the Carolinas, with plans to add 10 more within…