There was a place that hired a consultant for a project a friend worked on, and she was... I don't think she could write code at all. Like, had trouble manually inserting fragments into an XML file despite fragments with the same structure already being in the file.

Her productivity skyrocketed at night however, and she generally had working code in the morning, which lead to rumors that her husband or someone in her home country was doing the work (would have been daytime over there). Nobody really complained. She wore a hijab and the company had just hired it’s first “diversity officer” so maybe that’s why. Thankfully they stopped using that vendor not long after. It's a story a friend told me a long time ago. I didn’t and couldn’t fact-check it.

The husband’s theory came from the fact she apparently mentioned her husband was also a software consultant.