NAB's online-only brand, UBank, has migrated its 300,000 customers on to NAB's new computing platform, which is being built in partnership with software giant Oracle. UBank has long been seen as NAB's technology sandpit, and when its first online savings account was launched, in 2009, it ran on the iFlex banking platform, an Indian-developed system that Oracle acquired in 2007. Around the same time, NAB confirmed that Oracle would be its main partner on the $1 billion NextGen project to revamp its core banking platform.In the meantime, iFlex has become tightly integrated with Oracle's Fusion software - it is, essentially, a collection of modular building blocks which can be used, Lego-like, to build different computer systems. NAB and Oracle have created a "stack" of software comprising more than 500 individual Oracle applications to create the UBank computing platform. According to an NAB spokesman: "NAB has now launched an enhanced version of the original UBank platform."Besides allowing real-time processing of funds between UBank accounts, according to NAB's public relations media release yesterday, "the platform also introduces seven-day processing capability for the first time. The real benefits of this will be seen when all banks move to seven-day processing."That's not likely to be soon though, given the reluctance of the large banks - NAB included - to move to weekend processing of interbank payments. One customer-friendly twist from the new account arrangements is that NAB's UBank customers will earn interest from the calendar day that a deposit is credited, rather than from the next business day. NAB is around a third of the way through its technology refresh, which involves upgrading and building new networks, data centres and software. A key element is the replacement of 100 legacy applications with 10 integrated systems. Besides Oracle, the bank works with IBM, which manages its infrastructure and data centres; with Telstra, on its network; and SAP, on the systems that manage human resources, procurement and finances.