What is the ruling on working at Google, knowing that it is used both negatively and positively, and that impermissible acts occur through it? And is the statement: "No one knows" or "No one sees me" considered a form of polytheism in wording?

The ruling on working for websites depends on their content. If it is free of religiously prohibited elements, then there is no objection to it. If it is contrary to religious law, then it is impermissible. If it is mixed, then the work of the questioner should be considered. If their work is far from directly engaging in the forbidden or assisting in it, then there is no objection; otherwise, it is impermissible. As for electronic services and products that can be used for both permissible and impermissible purposes, the default ruling is that it is permissible to work with them, unless it is known or highly probable that they will be used for impermissible purposes.

As for the phrase "no one knows" or "no one sees me," it is not considered shirk in utterance, because the speaker intends humans or creation in general, and Allah Almighty is not included in their intention. This is supported by prophetic hadiths, narrations, and the statements of scholars who use this phrase with this very meaning.