I work mostly with Python since 2002, more or less, and with web applications primarily since 1995 (with one embedded C job, for the Brazilian electronic voting system). I used and would use again Python, Django, Flask, Twisted and Google App Engine. I like to use TDD and agile. I run from PMI-style projects, Java for web applications (it's fine on Android), PHP and would not be exceedingly happy with Node, but I find JS usable.