System Administration
- Linux dan basic shell scripting
- Cloud computing: Amazon, Rackspace, etc.
- Background processing: Gearman, Redis
- Search: Elasticsearch, Sphinx
- Caching: Varnish, Memcached, APC / OpCache
- Monitoring: Nagios
Web Development Tools
- Version control: Git, Mercurial, SVN
- Virtualisasi: VMWare, VirtualBox, Vagrant, Docker
Back-End Tech
- Web servers: Apache, Nginx, IIS
- Programming language: PHP
- Database: MySQL, SQL / JSON.
Front-End Tech
- HTML / HTML5: Semantic web
- CSS / CSS3: LESS, SASS, Media Queries
- JavaScript: jQuery, AngularJS, Knockout, etc.
- Compatibility quirks across browsers
- Responsive design (Bootstrap, etc)
- AJAX, JSON, XML, WebSocket
Design
- Converting website design into front-end code
- UI
- UX
Mobile
- Hybrid: Phonegap / HTML5