Jacob Thornton has been doing software development in the bay area for over a decade, as an early employee at startups like Twitter, Medium, and Coinbase. During this time he contributed to several large open source projects (most notably as the co-creator of Twitter Bootstrap), given talks around the world (https://www.youtube.com/watch?v=UIDb6VBO9os), and written several chapters in technical books (beautiful javascript, if Hemingway wrote javascript).