Constructive feedback explaining why you haven’t secured a position can be useful. However, not all companies are forthcoming about it. This is frustrating as a couple of lines isn’t taxing. Here are a couple of ways to get feedback after interviewing for the job either through a recruiter or directly.
Through a Recruiter
A recruiter should be able to explain to an applicant why they haven’t secured the position after interviewing for a role. If a recruiter hasn’t or has given you limited information, I would suggest one of the following:
Get the recruiter to explain on your behalf that you enjoyed meeting the company and you would appreciate interview feedback to improve for upcoming roles. I would register an interest if that company hires in the future.
I would also connect with the hiring manager or interviewers on Linkedin and send a note thanking them for their time. Based on the response (if there is one and judge on a case-by-case basis), I would also say if there is any feedback to help on other applications, you would be grateful. I would only do this if the response is positive and the other person starts engaging in conversation. Don’t be pushy!
Directly (pick one of the following)
If you built a good rapport with the hiring manager throughout the process, I would call directly and thank them and as above, explain how feedback would be useful
Email either the hiring manager or interviewers directly saying you would like to keep in contact and feedback would be welcome for future applications
Connect on Linkedin and politely follow up
The key thing in both scenarios is to explain why it is useful to you in a friendly manner. It gives a good impression and you are more likely to get a positive result.