An Answer Set Prolog developer uses the logic-based programming language, Answer Set Programming (ASP), to solve combinatorial search problems. They design, code, test, and debug programs using Prolog, often focusing on knowledge representation, reasoning, and problem-solving. Their work involves creating algorithms and data structures, understanding and interpreting complex mathematical models, and translating these into Prolog code. They also maintain and enhance existing code, troubleshoot issues, and ensure optimal performance. Furthermore, they may collaborate with other developers, researchers, or software engineers to integrate Prolog solutions into larger systems.