We introduced LinChemIn, an open-source python toolkit to work with synthetic routes generated by a variety of different sources, such as CASP tools and NOC. The toolkit enables interconversion between data formats and data models, as well as route-level analysis and operations. The Object-Oriented Design principles inspire the software architecture so that functions and modules are structured using appropriate architectural patterns to maximize code reusability and support code testing and refactoring. This also aims to minimize the effort needed to incorporate external contributions and to encourage open and collaborative software development. Moreover, the Domain-Driven Design principles were adopted to ensure a close match between the scientific domain (i.e., synthetic chemistry) and the structure and language of the code, fostering a constructive collaboration between technical and domain experts.