A Load Balancer Developer designs and implements software solutions to distribute network or application traffic across various servers, improving efficiency and reliability. They ensure that the load balancer operates optimally, distributing workloads evenly so no single device gets overwhelmed. They also troubleshoot issues, optimize performance, and work on security aspects to prevent unauthorized access. They must understand networking, application architectures, and have knowledge of algorithms related to load balancing. They often work closely with network engineers and system administrators, and may also need to create custom scripts or software to manage specific requirements.