Look around on the internet beforehand, since it's filled with sites where employees can post experiences they've had at other companies. You mention Glassdoor

Look around on the internet beforehand, since it's filled with sites where employees can post experiences they've had at other companies. You mention Glassdoor, but perhaps some of its alternatives might be useful as well: Like Rate my Employer (http://www.ratemyemployer.ca/Home http://www.ratemyemployer.ca/Home), Job Advisor (https://www.jobadvisor.com.au/ https://www.jobadvisor.com.au/), Kununu (https://www.kununu.com/ https://www.kununu.com/) and The Job Crowd (http://www.thejobcrowd.com/ http://www.thejobcrowd.com/). Yes, all these sites can be gamed if the company is persistant enough and floods them with fake or coerced reviews, but they can also give some impressions on what working there might be like. You should also check social media sites (LinkedIn and Twitter might be good places to find people's opinions on this stuff), as well as general mentions of the company's name in general. After all, if a bunch of articles start talking about how terrible the environment is on Medium, then that's probably a giant red flag right there. If you can find out, knowing the general level of staff turnover might be a useful metric too. Does the company often get people who work there for a couple of months and then quickly move on? That's a pretty good sign it's not a great place to work. If you see a bit of talk online about how a large amount of the team quit at once, or that staff turnover is high in general, it often means something has gone pretty wrong in recent weeks. As for what to see in the interview... well, I guess pay attention to the working environment, the behaviour of the staff, etc. If it looks chaotic or the employees look utterly miserable, then those could be warning signs in of themselves. Of course, you might not be able to tell this (if a company is very careful about their interview process), but that's pretty rare for startups and small businesses. Hearing a lot about 'culture'or 'company fit' might be a warning too, given how often it means 'acts like the boss/other staff and shares views/background'. As might the usual complicated interview procedures, suspiciously low pay, the office being in the middle of nowhere, etc. And