how long should you wait to hear back before checking in with the company?
For real, did you send it to a recruiter or submit it online? If you sent it online, do you have a contact at the company?
Given you have a contact to talk to, you could a) let them know you submitted your application through the online system (sort of a "heads up" email) and ask them about their process, or b) if you submitted your stuff to that person directly, give them 3-5 business days and then ask a process-related question.
ETA: I would never phrase the follow-up as "I sent my resume, have you made a decision yet?" No matter the time frame, it comes across as impatient. Just ask about their process, if there's anything left for you to do, etc.
This post was edited on 11/13 at 8:25 am