With a focus on web application development and deep proficiency in API, I am confident in my ability to troubleshoot and successfully fix your FastAPI endpoint. Over the course of my 4-year career, I have acquired Professional Certifications from tech giants like Google and Huawei, which have continually fortified my programming skill set in languages such as C, C++, JAVA, JavaScript, Python, and PHP -- the very ones that power your endeavor.
While a few freelancers might offer speculatory solutions for your upload_file endpoint problem, I propose a more hands-on approach. I will utilize my extensive experience and walk you through the fix, ensuring you understand the underlying issue while bringing your server to a reliable state. My swift and efficient work style has allowed me to consistently deliver flawless solutions ahead of schedule - which is exactly what you need for this task.
So let's not just "get it done," let's get it done well together. Choose me for this project, and eliminate the bothersome crashes and elongated uploading time permanently from your FastAPI server.