A FinalBuilder developer is responsible for automating the software build, deployment, and release process. They design and implement build scripts using FinalBuilder, a powerful automated build and release management tool. They work on integrating different developer tools, manage version controls, and handle error detection and solutions. The developer also schedules and controls the build process, ensuring the consistency and stability of the software. Additionally, a FinalBuilder developer monitors and maintains the build system to ensure its efficiency and reliability, and they continuously seek improvements in the build and release processes.