Worked on enhancing the Adyen/adyen-node-api-library SDK by improving the usability and modularity of its API surface. Focused on exposing the SessionAuthenticationAPI directly from the root SDK index, making integration more straightforward for customers. Reorganized and alphabetized service exports to improve code readability and maintainability, while addressing import path issues to align with code review feedback. Utilized TypeScript and Node.js to implement these changes, emphasizing clean API integration and future extensibility. The work established a more stable foundation for ongoing SDK development, supporting easier adoption and paving the way for additional modular enhancements in future releases.