The dev team hiring the engineers should gather together and write some specs. The leader should post the job online and then the team should deliberate on each candidate.
Everything else sounds like a waste of time.
Not all CTOs are good at hiring/writing an effective job description (what is an effective job description?). And it does stand to reason, like with many other things, that people use other job descriptions as inspiration.
For example:
Skill Level (pick one): Junior, Mid Level, Senior
Language (pick one or more): C, C++, C#, D, Go, SQL, PHP, Java, Ruby, Perl, Python, Rust
This isn't rocket science!