Technical writing is an essential part of the documentation of software products. While software developers and programmers are sometimes tasked with the requirement to write software documentation, the process is often better suited to dedicated technical writers and technical authors.
Technical writers are often found employed in the IT software industry, but they are equally in demand in other sectors such as oil and gas, legal and scientific industries.
When employing a technical writer it's essential to know that they have expertise in your chosen field. Ask to see examples of their work.
When employing a technical author with translation skills, make sure that they have the necessary language skills to be able to translate technical terminology in your business area.