Christopher Schofield focused on backend development and API integration during March 2025, working on the Adyen/adyen-node-api-library repository. He addressed a critical reliability issue by fixing the PossSDK Endpoint URL Prefix logic for possdk v68, ensuring that all requests consistently use the correct live endpoint URL prefix. This change improved the accuracy and reliability of API interactions by reducing endpoint-related errors. Christopher utilized TypeScript to implement and test the fix, demonstrating disciplined debugging and a methodical approach to issue resolution. His work maintained code quality and traceability, reflecting a focused and effective bug-fix cycle within a complex codebase.