Professionally, I'm a Site Reliability Engineer at Google. In previous jobs I was primarily a C++ software engineer working with embedded Linux devices. In my spare time (hah!), I like to develop video games.
Game Development
Q&A for professional and independent game developers
Server Fault
Q&A for professional system and network administrators
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Physics
Q&A for active researchers, academics and students of physics
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Mathematics
Q&A for people studying math at any level and professionals in related fields
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Programmers
Q&A for professional programmers interested in conceptual questions about software development
The Workplace
Q&A for members of the workforce navigating the professional setting
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites