Try the following in GOOGLE:
site:www.linkedin.com ariba ~developer "greater new york city area" (inurl:pub | inrul:in) -intitle:directory
Seemed to bring back quite a few Ariba developers. NOTE: On LinkedIN profiles, New Jersey is included in the Greater New York City Area since it is a suburb of NYC.(Northern NJ) So you will have both NY/NJ profiles. Depending where in NJ you need the people, you could also use "greater philadelphia area" to get folks from Southern NJ.