If your employer is happy with your performance then you are probably "good enough" as you say. However if you truly do always want to be improving your abilit

If your employer is happy with your performance then you are probably "good enough" as you say. However if you truly do always want to be improving your ability as a software engineer, then you are in luck, this field is so vast and deep that you can easily spend more than a lifetime improving! Finding out how and measuring it is another matter.