Noone can give you job visa like that. First you have to apply there, get an interview call, give the interview, get hired, and ask your company to provide you a job (residence) visa.
You have to get a visit visa, through some travel agent, or through some acquiantance in Dubai to arrange that, and then go there for a couple of month and search for job. In order to get a visit visa, you have to show your address in Dubai where you will live.
You can also get a tourist visa easily from a travel agent. However that is valid for only 14 days and you have to return after that timeperiod.