A Cellular Automata developer designs and creates algorithms that represent the interactions of cellular automata - a model of a system of "cells" whose states are determined by the states of neighboring cells. Typically used in computer simulations, these developers create rules for how cells evolve over time. They work with various fields like physics, mathematics, and computer science to simulate complex systems or processes. Their work can support research in areas such as artificial life, cryptography, and traffic modeling. They often use programming languages like Python or Java, testing and refining the behavior of their cellular automata models.