Well, I'm an English teacher and this is from one of my students. They were given the task to write an email to a friend, telling him/her about their job search. My corrections are in red. Thanks!

Hi Jack,
Thanks for your email. As you know, I sent a lot of CVs to many companies and I applied for three jobs in some of them. Maybe: I applied for a job in three of them, but is his version wrong? If it's acceptable, I shouldn't correct it.
The last week I've gone went to three (different) maybe unnecessary? interviews. The first interview was at Telefonica. They offered to me a job as a helpdesk assistant but I declined it.
The secoond interview was at Soft Parade company. It's an international company that it's has been in Argentiina since the 1970's and they are looking for programmers. I said to them that I've worked on for/with Microsoft and maybe they'll call me for a second meeting. I hope so, because it's a good job.
The last interview was at Tower Records. They are looking for a shop assistant for their computers (Is this OK or should it be "computing/ computer") sector. It's not an attractive job, but I don't disscard it. I preffer the programmer job.(Is this OK? If not, how would you rephrase it?)
Regards,
Daniel.

If you think some of my corrections are inappropriate, please let me know.