Take this from me,don't sell yourself so cheap.Don't let anybody fool you that salary in Qatar depends on your nationality/country of origin.If you're good at your profession,then the sky is your limit.
Back to your question,the minimum salary for a software engineer should not be less than QR10,000/month with free fully furnished 1/2 bedroom flat with all utilities paid + free medical insurance+free yearly return ticket for self and family+free car+ family status employment.
You shouldn't settle for less.If the company can't pay you,take your time to look for others.
A word is enough for the wise.