Karolina Bronowicka developed an Adyen payment gateway integration for the spree/spree repository, expanding Spree Commerce’s checkout capabilities. She designed and implemented a configuration page that allows merchants to enable and manage Adyen as a payment option, reducing checkout friction and supporting increased conversion. Her work included creating comprehensive Markdown documentation and setup guidance, as well as new assets to streamline onboarding for merchants. Focusing on integration and documentation skills, Karolina ensured the solution was accessible and easy to adopt. The depth of her contribution is reflected in the end-to-end approach, from technical implementation to user-facing instructional materials.