Tā zài dàchǎng zuò yùnwéi, jīngcháng bànyè bèi call qǐlái.
He does ops at a big tech firm and often gets paged in the middle of the night.
Tips
usage
Abbreviation of 运行 yùnxíng (run / operate) + 维护 wéihù (maintain). Closest English equivalent is 'DevOps' / 'SRE' / 'sysadmin' depending on context — covers everything from server uptime to deployment pipelines.