Seeking Vietnamese OpenCart developer for ongoing work

OBS: We are seeking a Vietnamese developer for this project, as you will be working closely with our Vietnamese team leader. If you are not Vietnamese, please don't waste your own and our time bidding, you will not be taking into consideration. We are seeking an experienced PHP developer to help us with an OpenCart project. The web shop is a heavily modified OpenCart system that needs a lot of adjustments and changes. We are mostly talking front-end changes in UI behavior, layout changes, etc, but some back-end changes might be needed as well. You must have good knowledge and experience about PHP and OpenCart, and be able to work at least 15-20 hours per week. If you can work more hours and/or are located in Ho Chi Minh City, it's a huge plus. We are looking for a developer in the price range of U$5/hour.