In my work i'm using any of this framework: dojo.js, extjs, phpunit, yii, symfony, and e.t.c.
I'm worked as developer, lead developer, programm architector, CTO and CIO in large russion companies, and know about all processes in web development, management, quality testing and supporting of hight load projects.
In high load projects, i'm using: nginx with php-fpm. memcached and mysql. i'm create a very scalable systems and architecture.