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.
That guy is such a devloper, he just wasted a day due to an unplugged network cable.