After applying for a job for which I am a very strong match, I have never been given the chance of an interview at Checkout.com.

After inquiry, I understood that someone at my current company gave negative feedback.

Before discarding a profile, my advice is to do a proper background search on someone. The best way is to ask multiple sources, not just a single source.

Also, question the fact that if I was that bad, why would my current employer give bad feedback in an attempt to retain me?

Feedback on potential candidate from current employer