Demand for computer specialists and programmers is up by 50 percent year over year, according to data released this week from Wanted Analytics, a firm that tracks online job ads. More than 42,000 new job ads have been placed online for computer specialists and programmers with mobile application and development skills over the last 90 days.

After hiring slowed in June and July, demand for programmers with mobile development skills bounced back with more than 17,000 online job ads in September.

Some of the most sought computer specialist workers are software engineers, web developers, project manager, systems administrators or engineers, iPhone developers, and Java developer. The metropolitan area with the highest hiring demand for mobile programmers in the last 90 days was New York, with more than 4,200 new online job ads posted in the past 90 days, a 56 percent year-over-year increase. San Francisco, San Jose, Seattle and Washington, DC, round out the top five metro areas with the greatest demand.