A Blender developer works on the open-source creation suite, Blender. They contribute to enhancing its features, fixing bugs, improving performance, and maintaining its overall codebase. Their tasks may include rendering, modeling, animation, video editing, scripting, and creating simulations. They also collaborate with artists, animators, and other developers to understand user requirements and implement them effectively. Furthermore, they write test cases to ensure the software's robustness and reliability. Blender developers also stay updated with the latest trends in technology to incorporate innovative ideas into the software. They play a crucial role in the continuous development of Blender software.