A Delayed Jobs developer specializes in managing and optimizing background jobs within software applications. Their tasks involve scheduling tasks to run at specific intervals, thereby preventing immediate execution and minimizing server load. They use tools like Delayed Job, a Ruby gem, to handle long-running tasks outside the normal request-response cycle. This involves setting priorities, handling errors, and ensuring tasks run reliably and efficiently. They also monitor job queues, debug issues, and optimize performance. Their work improves user experience by preventing application slowdowns or crashes due to heavy or time-consuming processes. They are integral to maintaining smooth and efficient software operations.