Is 1 Corinthians 15:27 problematic for trinitarians? Bible hub has several translations of 1 Corinthians 15:27. 
NKJV reads


  For “He has put all things under His feet.” But when He says “all things are put under Him,” it is evident that He who put all things under Him is excepted


To me, as a non trinitarian, this scripture seems to support the idea that Jesus as a unique spirit creation of Jehovah occupies a lesser position than the Almighty Jehovah but is at the same time in a superior position to every other being in heaven and on earth.

I’m sure the Christians who believe Jesus is co-equal with the Father have an explanation of this verse too.

How do trinitarians interpret and explain it?
The Queen of England is greater than me in that she is my Queen and I am her loyal subject.. but we are equal in that we are both human.
My father is greater than me in that he is my father, but we are equal in nature, in that we are both human.
The Son of God is, and always has been from eternity, subordinate to the Father in his role as the Son.  This subordination is not because of any difference in nature, each one has the divine nature and is therefore God.  The three members of the Godhead are equal in nature, but have different roles.
So Jesus called God his Father &quot;making himself equal with God&quot; (John 5:18) - that is Jesus is equal with God the Father in that they share the same nature.  But &quot;my Father is greater than I&quot; - that is in the Father's role as the Father.
In this understanding Christ was always, is always, and always will be subject to the will of his Father, obeying Him as His Father.  This obedience springs out his perfect love for his Father.  His obedience is no contradiction of his Divine Nature: Jesus always was, is, and always will be God the Son.