You’re also interviewing them to see if you wanna work there. Ask questions about the company’s goals and plans and working styles. Find out about the culture from people working there (even better if you can ask them to speak to additional people not on the hiring panel, provided you make it to final stages). Ask people stuff that gets at the kind of working environment it would be for you: when was the last time they took vacation and how often do they? How does the company prefer to communicate? Is it a meeting heavy culture? Etc etc etc, just ask whatever you can to get a sense of whether you’d be happy in this environment say 18 months.