Macromolecular engineering is an interdisciplinary research field dedicated to the rational design, controlled synthesis, and precise manipulation of the structure, architecture, and composition of macromolecules, such as polymers and biopolymers. This field investigates the fundamental principles governing macromolecular synthesis, assembly, and structure-property-function relationships, employing advanced synthetic methodologies and characterization techniques to create materials and systems with tailored characteristics. Its significance lies in enabling the development of novel functional materials, advanced therapeutics, diagnostics, and nanotechnologies for diverse applications.