Worked on the aymericzip/intlayer repository to enhance cookie management, server-side rendering, and cross-platform compatibility. Developed a new maxAge attribute for cookie storage, providing more precise control over expiration and updating the configuration schema accordingly. Improved SSR and hydration reliability by enabling dynamic dictionary serialization and aligning resource handling between server and client, supported by comprehensive unit and integration testing. Addressed Windows compatibility by normalizing file paths to POSIX separators across core and plugin code. Utilized TypeScript, Node.js, and Vite throughout the development process, focusing on robust testing practices to ensure stability and prevent regressions in cross-platform environments.