For your own protection, do not allow them to process your visa without seeing and/or agreeing on the job offer. It maybe a simple thing but, when the visa is processed and the salary, benefits, etc. is not good enough for you to consider and/or accept the offer, you are already tied up to the company. Meaning, if you have another offer with better salary and benefits, you can't go to Qatar that easy. Either you have to wait for six months expiration of your visa issued by this company or, ask this company to cancel your visa, either way, it will give you HEADACHE.