To be honest, I don't appreciate much change between the previous and the new profile... Isn't skilled mastery a bit redundant? As redudant as WordPress.
If you still want to follow with the same message, I would do a few changes (be aware the English is not my main language, though)
"Over 5 years mastering in WordPress, Magento , Adobe Business Catalyst, HTML, CSS and other Web Development technologies. I have a deep knowledge of PHP, Weebly, MySQL and cross-browser compatibility issues. My core competencies can be applied to small/medium businesses. I am able to act as a Project Manager in larger developments, too. I am flexible and proactive. I find deep satisfaction in building websites and web apps that maximize the potential of your business and produce superior Return on Investment (ROI)"
At least, it is not that repetitive