Centralized Project Management Interface

I need an efficient and intuitive interface for centralizing project management processes. The goal is to enhance overall productivity by merging functionalities into a single platform, reducing the inefficiencies caused by switching between multiple tools. Key features required include task tracking and assignment, calendar and scheduling functionalities, and secure file sharing and storage. This project should result in a streamlined workflow that saves time and improves collaboration. If you have experience developing such systems, I'd love to hear how you can make this vision a reality.