A Calibre LVS (Layout Versus Schematic) Developer designs and develops electronic design automation (EDA) tools used in the verification process of integrated circuits (ICs). They work with Calibre, a market-leading IC verification software, to ensure that the physical layout of the circuits matches the schematic design. They also troubleshoot and improve verification flows, develop new methodologies for physical verification, and interact with design teams to solve issues. Their role is crucial in ensuring the accuracy and quality of IC designs, ultimately contributing to the production of reliable and efficient electronic devices.