Johnathan Hebert

A rich text editor written in JavaScript that runs on iOS, Android, Mac, Windows, and the web. The editor makes heavy use of the content-editable technology provided by browsers, and has an impressive structure to guarantee smooth editing on top of multiple platforms. It is reliably used by many millions of Evernote users to improve their productivity every day.

At its core, it is listening for every keystroke and user event coming into the editor and reconciling them into a rendered rich text document that reliably displays the users intent. It does an impressive job of overcoming many browser bugs and limitations that surface when accepting arbitrary HTML input from a variety of sources on a variety of platforms.

An image annotation app written in JavaScript as well as the custom 2D graphics library that powers it. The application is also bundled into the Evernote applications as an image annotation feature. It makes heavy use of the canvas element, immediate mode graphics, and coordinate transformations to give the user the feel of a modern vector graphics app. The image annotations and manipulations run at a smooth 60 fps and use the best parts of the browser's canvas element to provide a rich addition to images on the web.

An application available to Bank of America institutions and high-net worth individuals that allows them to price and research commodity indices. The application has an advanced charting and reporting interface on the web that breaks commodity indices down to their constituent parts and shows how the index price is computed. In addition to the front-end display, the back-end is tied into the Bank of America ongoing risk calculation and index positions with investors. It calculates prices in near real-time and streams them to the front-end built in Ext.js.