There is a full-size truck cabin in the middle of the head office CameraMatics in Parkwest in west Dublin. It is where CameraMatics, one of Ireland’s fastest-growing start-ups, show its customers its full range of fleet risk management technology in a realistic setting. Co-founder Mervyn O’Callaghan is showing me the cab while we wait for a sales meeting to finish in its large glass-walled boardroom. The meeting is running over so I suggest we conduct our interview in a coffee shop nearby instead. As we walk, we pass the offices of Workhuman, the Irish unicorn led by entrepreneur Eric Mosley.…