In 1927 Bayev moved to Yerevan and from 1929 to 1930 worked as the head of "ArmSelStroy" (Armenian agency for rural construction), where he constructed about 200 buildings, among them Pioneer's Palace of Yerevan, State Bank of Armenian SSR, Ministry of Justice, Yerevan Mechanical factory, old hall of Sundukyan Theatre, "Ararat" trust buildings, etc. In 1945 he was awarded by the Honorary diploma of the Presidium of the Supreme Soviet of the Armenian SSR.