Netflix hires very few entry level engineers. I just checked their jobs page[1] and there are almost no postings for non-senior engineers.

I'd argue that a senior engineer should be highly effective while still developing in her role. Also, expectations for different "levels" of engineer vary. Typically an "exceeds expectations" performance review for "Senior SDE" would be neutral for e.g. a "Staff SDE."

[1] curl 'https://ats-api.netflix.com/postings' | jq '.postings[]|select(.organization[] | contains("Engineering"))|.text' | grep -v Senior