Select the best-looking roles from the contacts you get, then audition the recruiters. Depending on your experience, this may mean relying on your gut. It also means meeting in person if possible, or at least on the phone. You want synchronous communications and the highest semantic bandwidth you can get. If they won't give you half an hour, that alone is a huge red flag. There's some other pointers in https://news.ycombinator.com/item?id=28029857