The role of Fullstack Shopware Developer at Aurivian GmbH involves implementing customer projects using Shopware 6, focusing mainly on backend development in PHP and Symfony. Responsibilities include developing Shopware plugins, customizing storefronts, integrating external systems, and conducting code reviews. Candidates are expected to have 2 to 5 years of experience in PHP development, with strong skills in Symfony, Twig, and MySQL, as well as basic frontend knowledge.