Always hire a professional Magento development service to ensure that you get the best results. You can read online reviews about the different web design companies before hiring one. Make sure that the company is in business for some years and has handled similar projects in the past. One of the renowned names in the field of web designing is Driven Web Services. The experienced web designers of the company can certainly help you with the eCommerce website development. You can even get custom themes developed by the designers.
Driven Web Services also offers SEO services, so you need not go to other companies for traffic generation.