A Golang developer designs, tests, and maintains software applications using the Go programming language, also known as Golang. They create efficient and reliable code, troubleshoot applications to optimize performance and manage software updates. Their work involves back-end web development, server-side programming, and building scalable, high-performing systems. They also ensure the responsiveness of applications and work alongside front-end developers to integrate user-facing elements with server-side logic. Furthermore, they might collaborate with other team members to define and implement new features, improve the existing ones, and spot and fix bugs or bottlenecks.