A Genetic Programming developer designs and implements computer programs that use the principles of evolution to automatically solve problems. They work with algorithms that evolve solutions to complex tasks, mimicking the process of natural selection. They select, mutate, and mate potential solutions, creating successive generations of programs to improve performance. Developers must define the problem, establish parameters for solutions, and set fitness functions to evaluate program effectiveness. They apply this technique in diverse fields like optimization, machine learning, and artificial intelligence. Their work requires strong programming, analytical skills, and understanding of genetic algorithms.