Jonathan Chaffer is a member of Rapid Development Group, a web development firm located in Grand Rapids, Michigan. His work there includes overseeing and implementing projects in a wide variety of technologies, with an emphasis in PHP, MySQL, and JavaScript. He also leads on-site training seminars on the jQuery framework for web developers.

In the open source community, he has been very active in the Drupal CMS project, which has adopted jQuery as its JavaScript framework of choice. He is the creator of the Content Construction Kit, a popular module for managing structured content on Drupal sites. He is also responsible for major overhauls of Drupal's menu system and developer API reference.

He lives in Grand Rapids with his wife, Jennifer.

Karl Swedberg is a web developer at Fusionary Media in Grand Rapids, Michigan, where he spends much of his time making cool things happen with JavaScript. As a member of the jQuery team, he is responsible for maintaining the jQuery API site at api.jquery.com. He is also a member of jQuery's Board of Advisors and a presenter at workshops and conferences. When he isn't coding, he likes to hang out with his family, roast coffee in his garage, and exercise at the local CrossFit gym.