Despite high energy prices, rising inflation, falling retail sales, a rough housing market and a host of other troubling economic indicators, IT hiring is still showing some signs of life.

You just need to have the right skills—or apply to the right kind of company. And for some of those would-be employers, finding people to fill the jobs they have available isn't proving to be easy.

For example, there are plenty of open jobs for software developers with experience building wireless or embedded applications, according to Jim Lanzalotto, vice president of strategy and marketing at Yoh Services LLC, a Philadelphia-based staffing agency and outsourcing vendor. "It's a dead-on market for those guys, with unemployment rates of less than two percent," Lanzalotto said.

Also in demand, he said, are IT workers and consultants who have SAP know-how or are familiar with rival ERP applications, such as Oracle's PeopleSoft human resources software. SAP AG itself has estimated that about 30,000 more technical specialists are needed worldwide to fill a skills gap for its apps, Lanzalotto noted.

On the other hand, he said IT projects that don't "touch the customers" may be canceled or deferred because of tight budgets. As a result, companies that are in hiring mode now are typically trying to use IT to help boost their revenues, not to make internal improvements, Lanzalotto said.

Amazon.com Inc. is a case in point. Amazon was one of several companies that sent recruiters to the O'Reilly Open Source Convention in July, in hopes of finding the right candidates for IT jobs that it has available.

Brian Krueger, Amazon's vice president of global talent acquisition, said in a follow-up interview that the online retailer and Web services company is looking to hire a variety of new IT workers "to fuel our growth." That includes software developers and people with experience in designing enterprise-class systems, as well as development and technical program managers, network engineers and tech support workers. Specific skills that are being sought include Java and C++ expertise from a programming standpoint, plus experience working with Linux, Windows, Unix and Mac OS X.

But Krueger indicated that attracting candidates for all those positions hasn't been easy, partly because of Amazon's retail-oriented image. He said that at the O'Reilly conference, many attendees asked the company's recruiters what they were even doing there.