Viaro does not focus solely on Magento development and e-commerce, so if you are looking for a service that can help you not only with that but also with broader issues then you should definitely consider hiring them. For example, they also work with many clients who need mobile apps and software testing / quality assurance of all types of business systems, big and small. The service is based in the United States, so they can offer you engineers and developers either from the US or hand picked offshore workers. You can even mix and match between the two, which may help you to stay within budget on your important projects.