I’m Jeff, a humane designer & technologist who’s passionate about building products to improve people’s lives.

I’m the former Head of Design at Optimizely. Before that I was a Product Designer and a UI Engineer.

Before joining Optimizely, I earned my Master’s degree at UC Berkeley’s School of Information, where I studied technology, design, and behavioral economics. View my full online resume here (includes print styles!).

I’m also a tennis player and musician (guitar/bass/drums).

This is my personal site that I use to write about design, code, A/B testing, and other topics that interests me. A few of my most popular posts:

Side Projects

Conference Talks

Get in Touch

You can find me on Twitter, Instagram, Medium, LinkedIn, Github, and Gmail (jlzych@).