Worked on the Labelbox/labelbox-python repository to enhance the accuracy of API contracts and improve the developer experience. Focused on backend development and API integration using Python, the work involved correcting the return type of the get_roles method to reflect actual runtime behavior. By updating the type hint from a list to a dictionary mapping strings to Role objects, the change strengthened static typing and enabled more reliable static analysis and IDE support. This adjustment reduced the risk of integration errors for downstream consumers, ensuring that the Python client’s type annotations accurately matched its real-world data structures and usage patterns.