According to the police, Sapna Pandey went to the washroom of the IT company this morning and did not come out for long.
Suspecting trouble, her colleagues knocked at the door repeatedly but got no response after which the door was broken by the management staff, police said.
They found Sapna unconscious and rushed her to a hospital where doctors declared her brought dead, police said.
Sapna, a resident of Sultanpur district of Uttar Pradesh, was living in Sector 15 area on Noida.
"Exact cause of the death will be known once post mortem report is received," said Rita Yadav, SHO, Sector 20 police station.