Whenever I hear about Operating Systems, it reminds me of a comic on how a programmer evaluates the resume of another programmer and one of the items is OS / Co

Whenever I hear about Operating Systems, it reminds me of a comic on how a programmer evaluates the resume of another programmer and one of the items is OS / Compiler development experience is highly valued. So, on a related note, would you be suitably impressed with a resume if it lists that it has a bare bones file system / shell implemented ?