Ask HN: Website for hosting dev interviews?

Mulling over the idea of a website focused on managing coding interview loops. MVP would have live interview features (problem statement, coding whiteboard, maybe compilation and execution) and communication/collaboration features for interviewers (save/review interviewee's solutions, taking/sharing notes, interview topics coordination, history of problems asked).

Is anything like this already out there? Opinions on usefulness for you/your company?