I'm a hiring manager (not at a tech company, FWIW) for college-degreed, relatively senior professionals. If your resume shows a short job, say, less than a year, I won't care. If the last five jobs you held down have been for less than a year each, it goes in the circular file.

Maybe I'm missing out on good people, but I have more candidates than I can handle already, and it's a pretty abnormal pattern in the field.