Mainspring is seeking Staff Level Mechanical Engineers with a focus on designing systems that require thermal and fluids analysis. In this role, you will design system architecture and hardware for air and liquid handling systems. The Engineer will develop new concepts and manage existing concepts through development, deployment, and manufacturing. Mainspring is a great place for engineers with a variety of areas of deep expertise, who like to solve challenging cross-functional problems with a mix of computational analysis, hands-on engineering and team effort.