Worked on the Pixez Flutter repository to address a critical network stability issue affecting Pixiv API connectivity. Using Dart and Flutter, applied expertise in API integration and network configuration to resolve a persistent 421 error by updating API endpoint IPs and aligning the app’s network settings with the latest server resources. This fix improved overall reliability and reduced failed API calls in production environments. The solution involved validating changes across the app’s network layer and documenting traceability to specific commits, ensuring future maintainability. The work focused on backend connectivity rather than feature development, emphasizing robust network infrastructure within the Flutter application.