
Highload application development, higload database/nosql cluster architecture, backend/API architecture, code review/optimization/cleaning/profiling/debugging, unittesting, newbie programmers leading.
Python:
PHP5: OOP, ZendFramework, memcache/diskcache
nosql: Cassandra 0.6+, MongoDB 1.8.x, nosql thinking
MySQL: highload optimization, slowlog review, bottlenecks finding
Other: RabbitMQ (celery), eJabberd (pubsub, wokkel, idavoll)
Technologies: XSLT, jQuery
Protocols: REST, OAuth, JSON-RPC, XML-RPC, Rackspace CloudFiles
APIs: Facebook, Flickr, Picasa, Photobucket, Youtube, Google (static) Maps ...
Visual Paradigm for UML, NetBeans