Programmer, developer, entrepreneur, professor.

80x86, C, C++, Java, Python, Visual Basic, PHP, Javascript, SQL, PostgreSQL, subversion, apache, object-oriented programming, object modeling, compilers, operating systems, architecture, optimization, graphics, digital audio, HTTP, HTML, CSS, AJAX, JSON, XML, modeling, networking, security, cloud, JUnit, PHPUnit, test-driven development, extreme programming, software engineering, agile development, version control, etc.