Half a decade ago at a large energy company, there was a group that had ramped up hiring of a lot of contract developers for full stack greenfield app dev (not

Half a decade ago at a large energy company, there was a group that had ramped up hiring of a lot of contract developers for full stack greenfield app dev (not Salesforce or SAP, etc). Lots of us employees were pulled into interview candidates that staffing agencies were throwing us. Many turned out great, but 2 in particular were suspected of being different people from the interviewee. There was a month or more since the interviews and the people managing the teams often weren’t the same as the people who had participated in the interviews but after comparing notes, we realized that the people on the phone were certainly more astute than those who had come on-site (this was before video interviews had taken off). All of these teams were using IntelliJ and one of the team leads I managed expressed concern about how he noticed a contractor assigned to his team was using Windows Notepad to write Kotlin for his Spring Boot server controllers. He also heard of some other developers seeing this guy with his laptop on the far side of the large floor quietly talking on a cell phone for an hour or so. I think we let him hang out for almost a week before we told the staffing agency.