I took the "quiz", it said i was not eligible. It did not say why. ¯\_(ツ)_/¯

But you think it's very easy? I wonder what I'm missing.

Other brief googling research.... it might require you to be earlier in your career (first five years?) than I am?

It's a scam.

say more?

(Also, it looks like it may not in fact be very easy to get a UK visa simply by being a software engineer?)

It's not just that the criteria they publish is incredibly ambiguous, but they will make decisions based on different, secret criteria.

For example, while not stated anywhere, there seems to be an expiration date of five years for anything you list.

And, yes, there doesn't seem to be a good UK visa for software engineers.