WordPress Developers design, implement and manage websites using WordPress, a free, open-source content management system (CMS). They are responsible for both front-end and back-end development — everything from plug-ins to security updates. WordPress Developers establish and guide website architecture, so sites are attractive and user-friendly. They are responsible for WordPress training as well as troubleshooting and resolving website problems for clients and co-workers. WordPress Developers can work for many industries, including graphic design agencies, marketing firms, and computer systems design firms.