I make large (really large) web services. My primary task is to make them robust (but I also go for easy-to-use). Thread concurrency? That's the easy stuff. I'm talking about large-scale distributed systems.
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Ask Different
Q&A for power users of Apple hardware and software
Personal Finance & Money
Q&A for people who want to be financially literate
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Personal Productivity
Q&A for people wanting to improve their personal productivity
