With over 8 years of experience as a Software Engineer, I can confidently state that I'm an expert at Delphi Programming as well as Windows Application Development, which makes me tailor-made for your project. I’ve successfully created various software and web applications that require complex file handling and manipulation, precisely the skills you are looking for. My broad knowledge in C, C++, C#, Java, Python, .NET would definitely come handy here too.
What sets me apart from other freelancers is my extensive troubleshooting capabilities. A project like yours calls for someone with the ability to quickly identify issues and come up with swift solutions. Be it file type filtering or efficient file movement, I ensure optimum performance and seamless functionality.
Moreover, I adhere strictly to timeliness and efficacy while adhering to the highest coding standards. I'm confident that I will deliver you the Delphi-powered Windows File Selector App you desire. Let's bring your vision to life!