Joao Barros contributed to the epilot-dev/sdk-js repository by delivering targeted enhancements to the Customer Portal SDK over a two-month period. He focused on aligning the client with evolving API specifications, introducing support for journey-based OTP email template IDs and updating OpenAPI definitions to reflect new messaging flows. Using TypeScript and OpenAPI, Joao implemented optional fields and synchronized timestamp formats, ensuring backward compatibility and minimal surface changes. His work improved API reliability and developer onboarding while laying the groundwork for future OTP journey features. The depth of his contributions centered on robust API integration and precise contract adoption without major bug fixes.