Developed a client-specific rules retrieval endpoint for the Northeastern-Electric-Racing/Argos repository, enabling precise access to rules subscribed by individual clients. Focused on backend development using Rust, the work emphasized robust API design and incorporated comprehensive automated testing to ensure that only the correct rules were returned for each client. All changes were tracked with clear, traceable commits, supporting maintainability and transparency. The implementation improved data accuracy and streamlined client-specific configuration retrieval, addressing a key requirement for the project. This contribution demonstrated effective use of Rust and API development skills, with a strong emphasis on test-driven development and reliable backend practices.