Gytis worked on improving the developer experience for the input-output-hk/cardano-js-sdk repository by simplifying CORS origin configuration in development and pre-production environments. Using Nix and applying configuration management and DevOps skills, Gytis implemented a change that disables origin filtering by setting backend.allowedOrigins to null in dev-preprod. This adjustment reduced manual setup time and minimized configuration drift, enabling faster testing and smoother onboarding for developers. The work maintained environment consistency while clarifying operational implications for security and deployment. Gytis documented the changes thoroughly, ensuring that the new approach to environment configuration was clear and maintainable for future contributors.