Flutter Developer (iOS & Android) – App Release & Deployment

We are looking for an experienced Flutter developer to take over the final release and deployment of our existing app. The app is already fully developed and uses Flutter Flavors with two separate environments: Development (DEV) and Production (PROD). A previous freelancer already started the release process and made some changes to the Firebase/Google configuration, keys and environment files. Google Sign-In was working before these changes but is currently not working correctly, so the new developer should first review the existing configuration and fix any mismatches. Scope: - Review the current DEV and PROD Flavor/configuration setup - Fix the current Google Sign-In/Firebase configuration issues - Build the latest Flutter code from our GitLab repository - Configure and deploy DEV and PROD correctly - Upload iOS and Android builds for testing - Prepare and submit the final app to the Apple App Store and Google Play Store - Fix any release-related issues required for store approval Important: ✅ The app is already fully developed. ✅ Flutter Flavors are already implemented. ✅ Google Sign-In was previously working. ✅ No new features are required. ✅ This is mainly a configuration, release, deployment and store approval task. Requirements: Strong Flutter experience Experience with Flutter Flavors Firebase & Google Sign-In configuration App Store Connect & Google Play Console GitLab / Git workflow Experience publishing Flutter apps on both iOS and Android Important: The App must be released today, 21.08 EOD