Daniela you can go with Sourcebits Technologies Web Development Company India located in the Silicon Valley, they have an edge over most other software companies, but pair that with their design philosophy and talented and experienced developers and Sourcebits truly stands out from the rest.

They specialize in Web, Mac, Android and the iPhone platform. On the Web front, they build world–class web sites and web applications leveraging the latest development trends and the freshest techniques. Besides this if they see something in an existing market that can be done in a better way, they’re going to dive in and take that on. They take pride in being one of the most cutting edge and creative software development companies in the world.

You can check out some of their web development projects using this link: http://www.sourcebits.com/web-develo...mming-services

Hope this may solve your queries in deciding a best web design firm.