His first collection of poems, Clinical Blues, was shortlisted for the Melita Hume Prize in 2012. In 2011, he was listed among the "Eight Young Nigerian Poets Whose Poems Delight" on the Sentinel UK Poetry Blog
In 2017, his second collection of poetry, A Woman's Body is a Country, was published by Ouida Books) Of the work, Ajayi says "I wanted my book to show how the noun "affection" becomes a verb, and in my attempt I was drawing from a personal reservoir, hoping that my experiences are singular as well as universal." He has been described as one who "writes about love like liquor that drowns a person into his or her feelings."
Ajayi has written short stories that have been published in Nigeria and abroad. He currently provides critical reviews about Nigerian music to a number of online publications.