Hi,
It all depends upon what salary bracket you are aiming in Qatar. There has been unexpected influx of foreigners in last 2 years, hence you will have to have sufficient funds to support your stay without a job.

Meanwhile keep checking www.bayt.com as this firm covers vacancies from across GCC & also Middle East region. Also track www.naukrigulf.com.

I suggest you join on http://qa.filipinoexpats.com/
& http://www.facebook.com/pages/Doha-Pinoy-Events-Group/365212657732.

Wish you best of luck,
- Yp -