As a seasoned developer with an extensive background in Flutter, I am confident that I can not only assist you, but also quickly identify and resolve the issues your app is facing. With the ability to strictly analyze and debug, I have successfully tackled similar problems in my previous projects. In one particular endeavor, my client was grappling with startup crashes similar to yours. Through thorough testing and logical implementation, not only did we resolve the issues, but we also fine-tuned the app for better performance.
Moreover, my proficiency stretches beyond just debugging; I am well-versed in iOS and Android platforms as well as common tools like Firebase (FCM), local databases, Web APIs (development and integration), Prototyping and more. This means that for any related issues or integrations, you will not need multiple freelancers; I can handle them all proficiently.
Lastly, with a strong belief in delivering nothing short of excellence, my commitment to quality is unparalleled. Given the opportunity, I assure you significant and prompt troubleshoots while providing regular progress updates throughout our collaboration. Let's join hands to improve your app's performance and see it flourishing just as you envisioned it!