You could say the same thing about being a software developer. That could be backend development, but even then there's different languages and tools: MongoDB,

You could say the same thing about being a software developer. That could be backend development, but even then there's different languages and tools: MongoDB, MSSQL, Oracle. Even the server languages can differ vastly: Java, .NET Core, Python, Ruby, that list goes on. Add "full stack" to that list and now it could include desktop software (Windows forms, WPF, etc), javascript frameworks, or mobile platforms (which can include swift, C, java, or some of the cross platform frameworks). Sure, all these skills are in demand, but good companies will explain what their interpretation of "Software developer" means in the job description. Then you, an expert in a few of those languages, will pick and choose what jobs to apply for. I don't see why the security field has to be any different.