I am in need of an experienced Flutter App developer with PHP Yii1 skills to troubleshoot and fix issues plaguing my three existing applications - all within the same project. The identified issues include: - Regular app crashes which occur at launch, during specific actions and randomly. - Slowed performance hindering optimal user experience. - Several UI/UX issues that need improvement. Unfortunately, I cannot pinpoint the specific actions causing the applications to crash, but I'm hoping your expertise can identify the reason(s). The ideal candidate for this project should have: - Extensive experience in Flutter app development and PHP Yii1. - Reliable problem-solving and debugging skills. - A keen eye for UI/UX design and improvement. - Experience in app launch and store submission. Please note, this project has the potential to turn into a long term assignment contingent upon the quality of your work.