Languages/Tools
Primary Programming Languages and Tools
PHP 5 (OOP, MVC frameworks/tools such as CodeIgniter and Laravel), LAMP, HTML, CSS/SCSS, Javascript, JQuery, JQuery UI, JSON, AJAX, XML, REST services, writing and using various APIs, responsive web design (Foundation JS, Bootstrap), PSD asset extraction
Development/Testing Tools
Tools for Optimizing, Testing or Debugging
Git, Subversion, XAMPP, WAMP, Node.js, Grunt, Browserstack, BugHerd, etc.
Databases
MySQL, Microsoft SQL Server/T-SQL, PostgreSQL, Oracle
eCommerce
APIs for Payment Gateways
Authorize.net, Stripe, PayPal (standard or Website Payments Pro)
Mobile
Mobile Development
HTML5, JQuery Mobile, CSS3, REST services, PhoneGap