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Salaries for chief information officers and chief technology officers in Chicago went up 9 percent last year to a range of $178,000 to $265,000, according to Mondo, a New York-based recruiting firm. That’s a steeper jump than the 7 percent increase seen nationally.

Ruby on Rails developers also continue to command top dollar, with salaries up 7 percent to $116,000 to $169,000. Data scientist salaries are up 6 percent to $84,000 to $124,000. Lead developers with Linux, Apache, MySQL and PHP/Python skills are getting 8 percent higher paychecks, ranging from $114,000 to $159,000.

According to the Bureau of Labor Statistics, salaries for workers in computer systems design and engineering companies in Illinois rose 9 percent to an average of $104,468.

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