Following up after a job interview is key, it shows persistence and it’s also polite to let the interviewer know you appreciated their time. It’s also good to follow up within two days of the interview, however if it’s been longer than two days, a response is better than none at all. Keep the email light and professional, here is a sample email:
Dear Interviewer, It was great meeting you today, and I appreciate you taking the time to interview me. I'm excited to be considered for the (name the position) as well as all of the opportunities the company presents. I had a good time discussing my passion of (insert what you're passionate about) and really enjoyed learning more about (insert what new tidbit you learned about the company). Thank you for your consideration, and I look forward to following up with you.