PHP Expert Needed for longterm Project

Our Programmer died during pandemic. He was a PHP Genius, as he had multiple Degrees in Computer Science and PHP. We need his replacement. Programming is a model like adjacency-list, ability to do recursive programming, finding parent and child, going up and down the "tree" based upon those relationships. Commonly known as a MLM, multi-Level programming. It is about the relationships and doing calculations, for example, someone below pays and it pays someone up above somewhere in a certain position from them. So being able to find it. For example, John Doe signs up and pays his one time payment, and for that, we pay the person who referred him, them, but if they are not qualified, it needs to climb up to find the person above them that is qualified. and it gets a LOT more complex from there. If you have experience, and are looking for work, and can speak clear english, to be able to meet with us on zoom and work with us, please apply, If you cannot traverse an adjacency "tree" from the relationships, then please apply. If you cannot do it already, please do NOT apply. We may show you code and you explain what it does, if you cannot explain it, you won't go any further in the hiring meeting.