A Microsoft Solver Foundation developer is responsible for creating and implementing mathematical models and algorithms using the Microsoft Solver Foundation (MSF). Their work involves formulating and solving optimization problems, data manipulation, and decision-making tasks. They utilize MSF's modeling language to define constraints and goals in optimization problems. They also design and develop applications to solve real-world problems in various fields like finance, logistics, and supply chain. These developers require strong analytical skills, mathematical proficiency, and expertise in .NET Framework, C#, and other MSF compatible languages. Their role contributes to a company’s strategic decision-making process.