Alex is a designer at Tinker, a London-based studio that designs for the Internet of Things. Tinker helps people understand how online data can interact with the physical world through creative applications of new technologies. Some key concepts in IoT design discussed include sensors that collect data about the physical world, APIs that allow devices and software to communicate, and actuators that can trigger physical actions. Examples provided include smart home devices, interactive art installations, and ways of visualizing online communities in physical form.