This job posting appears to be a template or example, as the job description only contains placeholder text from "Example Domain". Therefore, it's not possible to extract specific responsibilities or a detailed description of the role. Typically, a Backend Engineer focuses on server-side logic, databases, APIs, and the overall architecture of web applications. Key responsibilities often include designing and implementing scalable and efficient server-side code, managing databases, ensuring data security, and collaborating with front-end developers.