A Linux Containers (LXC) developer designs, creates and manages lightweight, virtualized environments on Linux platforms. They work with LXC's operating-system-level virtualization to run multiple isolated Linux systems on a single control host. This involves configuring security settings, process isolation, file system isolation, and network isolation. They also ensure the efficient use of system resources, and troubleshoot any issues that arise. LXC developers may also work on integrating LXC with other technologies, like Docker or Kubernetes, to improve scalability and automation. They often need deep understanding of Linux kernel, system calls, and high proficiency in programming languages.