- JavaScript: Pure JS, Prototype.js + script.aculo.us, jQuery, OOP, AJAX (JSON)
- Java: Spring MVC, IceFaces, GWT, JSP, Hibernate ORM
- PHP5: OOP, Smarty
- HTML+CSS: good experience
- Small experience in NSIS & LUA
- Firefox & Google Chrome Extensions
- MySQL, Oracle, PostgreSQL
- Payment systems: PayPal, Plimus
- APIs: Facebook, Twitter, Mailchimp
- SVN, Git