Taught programming concepts to beginner and intermediate learners with real-world code examples in assembly, C, C⁠+⁠+, C#, Go, Haskell, Java, JavaScript, PHP, Python, Rust, SQL, and other languages.Over 250k views per month on programming educational YouTube videos.Over 120 concurrent daily viewers on Twitch.

Taught elementary-aged children programming with Scratch and Minecraft: Education Edition 1-on-1 and 2-on-1.Taught middle school and high school kids programming with Python 1-on-1.Developed personalized lesson plans for each student.

Ported 30-person 2-million-line project from Jenkins (CI), Bugzilla (tasks), & Gerrit (Git server; code review) to in-house apps. (PHP, Python, dev ops)Reverse-engineered Windows code-signing protocol, speeding up CI builds with Linux servers. Open source: fb-util-for-appx (C++, x86 assembly)Developed libraries for Instagram, Facebook, Messenger and WhatsApp on Tizen OS; and Instagram and Messenger on Windows 10. (C, C++)Optimized performance of build systems for VCS-aware filesystem. (Java)Managed three interns on two teams. Mentored two full-time employees.Taught engineers daily on topics like Git, Vim, C++, and clean code.

Developed ActionScript 3 compiler for porting Flash games and applications to iOS, Android, and HTML5. (JavaScript, Haskell)Created workflow tools and CI for easy cross-platform device discovery, app building and debugging, and app store packaging. (Haskell, dev ops)