Job interviews are increasingly happening after most people have gone to bed.

Ribbon AI, a voice-AI recruiting platform, told Business Insider that about a quarter of interviews conducted through Ribbon take place between 10 p.m. and 2 a.m. local time, according to data from more than 500 companies using the service. Among Ribbon’s manufacturing customers, that share rises to 35%.

Arsham Ghahramani, the CEO of Ribbon, told Alex Hutchings last week on the ThinkData podcast that the pattern may be driven by working parents with little spare time, or by workers in factories or kitchens who struggle to find a quiet place to be interviewed during…