Its the combination of documents (W-P, I-9 and bank information) that makes me think that there is a chance that its not legit. You meeting one of them in a coffee shop also makes me a bit...

Get their phone number from the internet. Call and ask for the person you interviewed with to see if he/she really works for them. With the information on the W9 and the I9, plus your banking...

Yes, a W-9 is for contractors. However an I-9 is for employees. I hope you haven't filled out either one of them yet, because you might be being scammed to steal your identity if the only contact...