To become a Golang developer, you need a strong understanding of the Go language and its idioms, including its syntax, data types, and control structures. A Golang developer should have a strong understanding of the compilation process and be able to optimize code for efficient execution. You should also understand how to handle errors in Go, how to use interfaces, and how to write concurrent programs using goroutines and channels. Familiarity with Go's standard library and popular third-party packages is important. Beyond Go-specific skills, you need a good understanding of computer science fundamentals, including data structures, algorithms, and networking concepts. Experience with software development tools, testing, debugging, version control, and principles of good software design is also necessary. If you're developing web applications, you'll also need to understand HTTP, REST, and possibly database technologies.