Notes is just that, for jotting down largely unformatted notes. The underlying content is HTML, and there is no word processing document (Word, or RTF) export, or sharing.
Pages v5 and later have the consumer product, word processing tools to build a sharp looking résumé from scratch, and some canned templates as well. It can export to PDF, and translate/export to Word .docx. If you are required to submit your work in Word format with a document size restriction — the single show-stopper is that Pages v5 and later create gargantuan Word documents that start at nearly 500KB. Even if you type a single letter 'a' and export it. This remains true for Pages v6 on macOS Sierra.
Secondarily, the applicant tracking software that electronically scans your résumé is expecting a document generated by MS Word, and Pages makes no accuracy guarantee on Word exports.
If you know that the submission criterion is in MS Word format, then I recommend the free LibreOffice Suite, or Word 2016 for Mac. In one form or another, LibreOffice has been in continuous, active development since 1992, and is purpose-built as an MS Office replacement suite. Its Writer application (Word clone) saves very small Word documents, that are far more compatible with MS Word than Pages exports.