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 on PHP, MySQL, and JavaScript. 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, now a part of the Drupal core used for managing structured content. He is also responsible for major overhauls of Drupal's menu system and developer API reference. In his spare time, he designs board and card games for the hobby market. He lives in Grand Rapids with his wife, Jennifer.