I am an experienced WordPress developer and work on high end WordPress websites daily. You can view plugins I have developed for WordPress at the link below, as well as my GitHub profile where you can see samples of my code.
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During the project I'm happy to chat with you regularly using the Freelancer chat, Skype, or Google Hangouts to keep you up to date with the project as we near completion. I do ask for 50% project milestone upfront, and the remaining 50% upon project completion.