An LXC (Linux Containers) developer is responsible for designing, developing, and maintaining containerization software. They work on the LXC library which provides a Linux-native, OS-level virtualization and process isolation technology. This involves creating lightweight 'containers' that run multiple isolated Linux systems on a single control host. They ensure efficient resource allocation, troubleshooting, and enhancing security. The developer collaboratively works with other team members, and often contributes to open-source communities. They need a deep understanding of Linux kernel internals, programming languages like C/C++, and expertise in containerization technologies. Their work enables scalable, isolated, and secure applications.