A Complex System Optimization Developer is responsible for developing, testing, and implementing optimization models and algorithms to improve the efficiency of complex systems. They work with large data sets and use advanced mathematical and computational techniques to solve problems. These developers also identify bottlenecks, inefficiencies, and areas for improvement within systems. They might work on systems like supply chains, manufacturing processes, or transportation networks. Moreover, they collaborate with other teams to integrate their solutions into the existing systems and ensure they are functioning optimally. Their work ultimately contributes to the overall performance and profitability of an organization.