Not sure what sort of job you are looking for, but at least from my experience these are the main sites to look a job in argentina:
- Computrabajo.com.ar
A lot of offers are from IT, but you are going to find everything in that site. There are even offers to work as a hosts/promotora, the girls that dress pretty and work showing of a company in some event. Is not just IT. Just make sure you are looking the dates, some offers are really old.
- Zonajobs.com.ar
I know is a pain in the ass to use that site, copy/paste your resume here, but there are a lot of offers in this site. It's really used in Argentina.
- Bumeran.com.ar
Smaller than these other twos, but there has been a lot of movement around this site to promote it (ads in the street, tv, internet).
- Linkedin Search and their advanced search, Simplyhired.com.ar.
I got my current job in an ad posted in linkedin. The offer wasn't in any other place, which was rare. Linkedin also has a really good advance search called simplyhired, you are going to find other stuffs there. I also receive every few weeks an email due to this site offering a position. Once you have some headhunters in your profile, the job will eventually come for you when you don't need it.
- Direct resume to companies.
Depending on what sort of job you like, you can send your resume to the companies through their site. Almost all of them have an special section saying "do you want to work for us?", giving you an email address or a way to upload your resume. Some of them ask you to complete a form, but hey, you are looking for a job.
That's my advice, good luck
