A Gstreamer developer designs and implements multimedia handling components using the Gstreamer multimedia framework. They develop software to process, stream, or encode audio and video data, enabling applications like media players, video editors, or streaming media broadcasters. Their tasks involve creating pipelines for media flow, handling multimedia data, troubleshooting issues, optimizing performance, and collaborating with other software engineers. They also work on integrating and synchronizing multiple streams and sources. They must understand codecs, streaming protocols, and container formats. It's crucial for them to keep up-to-date with advancements in multimedia technologies and Gstreamer updates.