Hey!That's a cool question! u have to know,in China software developer is a tough job,so they always call themselves “程序猿” which translated in English is "code monkey".But if you want to know the official Chinese statement,u can just say"我是一名软件开发人员" or “我是一名软件工程师。” both of them is right.

软件开发工程师 software development engineer，软件测试工程师 software testing engineer

程序员 or 程序猿 will be a great choice. Which means programmer.

This is a simple one，you could say：我是一名软件开发工程师！

你可以说：我从事IT行业