Rather than working on a real issue, I'd recommend a made-up task/feature, modeled after something they might actually do. Just put it in a repo and share to al

Rather than working on a real issue, I'd recommend a made-up task/feature, modeled after something they might actually do. Just put it in a repo and share to all candidates. It shouldn't take more than half a day's work. Then the next round is all about the candidates presenting their work and explaining their thought process. It's simulated, but exemplary of real work. And easily repeatable. (Also no need for NDA, etc.) Just requires a thoughtful engineer to develop the task.