A software developer so inattentive in their work to the point that they misspell their
job title and
don't notice the red squiggles under the word.
Usually a devloper is someone who produces little or no useful work. The
issues they cause tend to cause significantly more work for others than productive work they themselves actually achieve.
Depending on experience level
may be a junior devloper, and somehow eventually becomes a senior devloper, nobody knows why they
got promoted or why they are still employed, but is often suspected that they have incriminating photographs of their boss.