A Kanban developer is responsible for managing workflow efficiency in software development processes. They use the Kanban method, a visual system for managing work as it moves through various stages. Their tasks include visualizing work, limiting work in progress, and actively managing work items. They analyze bottlenecks, implement changes, and measure their impact to improve productivity. They also collaborate closely with cross-functional teams to ensure smooth project progression. Their ultimate goal is to achieve a balanced and consistent workflow, minimizing lead times and maximizing efficiency, thereby contributing to overall project success.