As a British speaker I would expect:

Nobody **needs** to hurry, **do** they?

However, and in response to your comment, we *could* also say

Nobody **need** hurry, **need** they?

The second option sounds strange but is also correct (in my opinion).

My understanding is that if you use 'need' and 'to' you are using need as a main verb, not as a semi-modal verb.  (Source: https://dictionary.cambridge.org/grammar/british-grammar/need)