As a Senior Application Engineer, you will be responsible for designing and developing Power Integrations' design tool, PI Expert. This collaborative role requires strong technical expertise in analog electronics and object-oriented programming. Responsibilities include defining and developing software for designing with power supply controllers, maintaining the existing codebase by bug fixing and implementing tests, and collaborating with software and electrical engineering teams to define requirements. The role requires defining and developing software to help customers design with power supply controllers. It also involves maintaining the codebase, fixing bugs, and collaborating with different teams.