If you’ve been rejected after a job interview, you might feel bad, feel like just moving on and finding another company. It’s natural, and I certainly understand. I’ve been lucky in my career to have few rejections, but I have had a few and I haven’t always taken it in any way other than very negatively.
This article talks about some things you might want to do in the corporate world. Write back to the manager, thank them, and ask about other opportunities. I hadn’t heard that before, but it makes sense, especially for the reasons given. Corporate people often “start over” with each job opening, not considering other candidates, even if they’ve been interviewed recently.
I have heard to reach out and ask what you could do better. I’m not sure how I’d respond to that as a manager, mostly because of potential legal issues. Also, it might not be anything that you did wrong, and just be that there were better candidates.
It’s worth reaching out, if for no other reason than to have your name in the mind of a manager that might need someone else.