Apple is seeking a highly skilled Module System Engineer to lead the development of test instruments for camera and battery module validation. This role involves designing sophisticated test equipment and measurement systems to ensure comprehensive testing throughout the product lifecycle. The ideal candidate will have deep expertise in electrical engineering, test methodology development, and instrumentation design, with a focus on optical-electrical performance parameters for camera modules and electrochemical testing for battery modules. In addition to instrument development, the engineer will be hands-on in deploying test systems in production environments, optimizing equipment during prototype validation, and ensuring compliance with quality standards. Responsibilities include creating test sequences, collaborating with cross-functional teams to enhance test coverage, and leading investigations into module failures. This position serves as a critical link between design requirements and scalable production solutions, requiring both technical expertise and practical implementation skills in high-volume manufacturing settings.