Triage Intake Analyst applicants have rated the interview process at HackerOne with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 95% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Smooth experience, questions asked were moderate. If you know advanced concepts you can let them know so they will skip the basic questions. Bug bounty experience is a good to have if you are applying for this position.