SwiftStack, a startup developer of software-defined storage technology, this week came out of stealth mode on the news that it has raised $6.1 million in its Series A funding.

That round of funding includes money from a strategic investor, UMC Capital, the investment arm of Taiwan-based semiconductor foundry UMC.

SwiftStack was founded in 2011 by a team of developers with experience in the Web infrastructure business, including some Yahoo veterans, said Joe Arnold, CEO of the San Francisco-based company.

SwiftStack is developing software-defined storage for object storage in order to make it easy for customers in the Web, mobile and software-as-a-service markets with a heavy mobile focus to run a public storage cloud inside their own data centers, Arnold said.