I am an open-source and open-education enthusiast, one of the beginning contributor of Chinese Wikipedia. Also I initiate a free education project - Wahlque.org in 2011.
As an engineer, I have experience on Java for almost 10 years, and in recent 3 years I practice real projects on Node.js, CoffeeScript, Python and Clojure, also I am programmer with an intermediate level skill of Ruby and Haskell. You can check with my projects on GitHub 1, 2, 3, 4.
Right now I am leading a small machine-learning team in Guokr.
Q&A for professional and enthusiast programmers
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for professional programmers interested in conceptual questions about software development
Q&A for WordPress developers and administrators
Q&A for power users of web applications
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Q&A for professional, enthusiast and amateur photographers
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for people studying math at any level and professionals in related fields
Q&A for theoretical computer scientists and researchers in related fields
Q&A for active researchers, academics and students of physics
Q&A for professional mathematicians
Q&A for professional system and network administrators
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for user experience researchers and experts
Q&A for biology researchers, academics, and students
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Q&A for those interested in logical reasoning
Q&A for scientists using computers to solve scientific problems
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry